Index: openacs-4/packages/acs-tcl/tcl/http-auth-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/http-auth-procs.tcl,v
diff -u -r1.1 -r1.2
--- openacs-4/packages/acs-tcl/tcl/http-auth-procs.tcl	11 Apr 2008 17:16:43 -0000	1.1
+++ openacs-4/packages/acs-tcl/tcl/http-auth-procs.tcl	11 Mar 2010 11:20:48 -0000	1.2
@@ -31,19 +31,19 @@
                             -password $password \
 			    -authority_id $authority_id \
 			    -no_cookie]
-	    if {![string equal $auth(auth_status) "ok"]} {
+	    if {$auth(auth_status) ne "ok" } {
 		array set auth [auth::authenticate \
 				    -email $user \
 				    -password $password \
 				    -authority_id $authority_id \
 				    -no_cookie]
 	    }
-	    if {[string equal $auth(auth_status) "ok"]} {
+	    if {$auth(auth_status) eq "ok"} {
 		# we can stop checking
 		break
 	    }
 	}
-	if {![string equal $auth(auth_status) "ok"]} {
+	if {$auth(auth_status) ne "ok" } {
 	    ns_log debug "\nTDAV 5.0 auth status $auth(auth_status)"
 	    ns_returnunauthorized
 	    return 0
Index: openacs-4/packages/acs-tcl/tcl/security-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/security-procs.tcl,v
diff -u -r1.59 -r1.60
--- openacs-4/packages/acs-tcl/tcl/security-procs.tcl	4 Jan 2010 17:06:00 -0000	1.59
+++ openacs-4/packages/acs-tcl/tcl/security-procs.tcl	11 Mar 2010 11:20:48 -0000	1.60
@@ -1651,7 +1651,7 @@
     if {[ns_conn isconnected]} {
         set hdrs [ns_conn headers]
         set host [ns_set iget $hdrs host]
-        if {[string equal "" $host]} {
+        if {$host eq ""} {
             set driver nssock
         } 
     }
Index: openacs-4/packages/acs-tcl/tcl/site-nodes-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/site-nodes-procs.tcl,v
diff -u -r1.86 -r1.87
--- openacs-4/packages/acs-tcl/tcl/site-nodes-procs.tcl	26 Nov 2009 14:18:47 -0000	1.86
+++ openacs-4/packages/acs-tcl/tcl/site-nodes-procs.tcl	11 Mar 2010 11:20:48 -0000	1.87
@@ -121,7 +121,7 @@
         }
         nsv_set site_node_url_by_object_id $object_id $url_by_object_id
     
-        if { ![empty_string_p $package_key] } {
+        if { $package_key ne "" } {
             set url_by_package_key [list $node(url)]
             if { [nsv_exists site_node_url_by_package_key $package_key] } {
                 set url_by_package_key [concat [nsv_get site_node_url_by_package_key $package_key] $url_by_package_key]
@@ -195,14 +195,14 @@
     @author Peter Marklund
 } {
     # Create a new node if none was provided and none exists
-    if { [empty_string_p $node_id] } {
+    if { $node_id eq "" } {
         # Default parent node to the main site
-        if { [empty_string_p $parent_node_id ] } {
+        if { $parent_node_id eq "" } {
             set parent_node_id [site_node::get_node_id -url "/"]
         }
 
         # Default node_name to package_key
-        if { [empty_string_p $node_name] } {
+        if { $node_name eq "" } {
             set node_name $package_key
         }
 
@@ -225,7 +225,7 @@
     }
 
     # Default context id to the closest ancestor package_id
-    if { [empty_string_p $context_id] } {
+    if { $context_id eq "" } {
         set context_id [site_node::closest_ancestor_package -node_id $node_id]
     }
 
@@ -271,7 +271,7 @@
     nsv_array reset site_node_url_by_package_key [list]
 
     set root_node_id [db_string get_root_node_id {} -default {}]
-    if { ![empty_string_p $root_node_id] } {
+    if { $root_node_id ne "" } {
         site_node::update_cache -sync_children -node_id $root_node_id
     }
 }
@@ -312,7 +312,7 @@
 
                 # Find the object_id previously mounted there
                 set cur_object_id $cur_node(object_id)
-                if { ![empty_string_p $cur_object_id] } {
+                if { $cur_object_id ne "" } {
                     # Remove the URL from the url_by_object_id entry for that object_id
                     set cur_idx [lsearch -exact $url_by_object_id($cur_object_id) $cur_node_url]
                     if { $cur_idx != -1 } {
@@ -323,7 +323,7 @@
                 
                 # Find the package_key previously mounted there
                 set cur_package_key $cur_node(package_key)
-                if { ![empty_string_p $cur_package_key] } {
+                if { $cur_package_key ne "" } {
                     # Remove the URL from the url_by_package_key entry for that package_key
                     set cur_idx [lsearch -exact $url_by_package_key($cur_package_key) $cur_node_url]
                     if { $cur_idx != -1 } {
@@ -347,7 +347,7 @@
         }
         
         db_foreach $query_name {} {
-            if {[empty_string_p $parent_id]} {
+            if {$parent_id eq ""} {
                 # url of root node
                 set url "/"
             } else {
@@ -358,14 +358,14 @@
             }
             # save new url
             set url_by_node_id($node_id) $url
-            if { ![empty_string_p $object_id] } {
+            if { $object_id ne "" } {
                 lappend url_by_object_id($object_id) $url
             }
-            if { ![empty_string_p $package_key] } {
+            if { $package_key ne "" } {
                 lappend url_by_package_key($package_key) $url
             }
 
-            if { [empty_string_p $package_id] } {
+            if { $package_id eq "" } {
                 set object_type ""
             } else {
                 set object_type "apm_package"
@@ -414,15 +414,15 @@
     The array elements are: package_id, package_key, object_type, directory_p, 
     instance_name, pattern_p, parent_id, node_id, object_id, url.
 } {
-    if {[empty_string_p $url] && [empty_string_p $node_id]} {
+    if {$url eq "" && $node_id eq ""} {
         error "site_node::get \"must pass in either url or node_id\""
     }
 
-    if {![empty_string_p $node_id]} {
+    if {$node_id ne ""} {
         return [get_from_node_id -node_id $node_id]
     }
 
-    if {![empty_string_p $url]} {
+    if {$url ne ""} {
         return [get_from_url -url $url]
     }
 
@@ -476,7 +476,7 @@
 
     # attempt adding a / to the end of the url if it doesn't already have
     # one
-    if {![string equal [string index $url end] "/"]} {
+    if {[string index $url end] ne "/" } {
         append url "/"
         if {[nsv_exists site_nodes $url]} {
             return [nsv_get site_nodes $url]
@@ -485,14 +485,14 @@
 
     # chomp off part of the url and re-attempt
     if {!$exact_p} {
-        while {![empty_string_p $url]} {
+        while {$url ne ""} {
             set url [string trimright $url /]
             set url [string range $url 0 [string last / $url]]
 
             if {[nsv_exists site_nodes $url]} {
                 array set node [nsv_get site_nodes $url]
 
-                if {[string equal $node(pattern_p) t] && ![empty_string_p $node(object_id)]} {
+                if {$node(pattern_p) == "t" && $node(object_id) ne ""} {
                     return [array get node]
                 }
             }
@@ -591,7 +591,7 @@
     return the site node id associated with the given object_id
 } {
     set url  [lindex [get_url_from_object_id -object_id $object_id] 0]
-    if { ![empty_string_p $url] } {
+    if { $url ne "" } {
         return [get_node_id -url $url]
     } else {
         return {}
@@ -625,7 +625,7 @@
     set result [list]
     set array_result_p [string equal $element ""]
 
-    while {![string equal $node_id ""]} {
+    while {$node_id ne "" } {
         array set node [get -node_id $node_id]
        
         if {$array_result_p} {
@@ -687,13 +687,13 @@
     
     @author Lars Pind (lars@collaboraid.biz)
 } {
-    if { ![empty_string_p $package_type] && ![empty_string_p $package_key] } {
+    if { $package_type ne "" && $package_key ne "" } {
         error "You may specify either package_type, package_key, or filter_element, but not more than one."
     }
 
-    if { ![empty_string_p $package_type] } {
+    if { $package_type ne "" } {
         lappend filters package_type $package_type
-    } elseif { ![empty_string_p $package_key] } {
+    } elseif { $package_key ne "" } {
         lappend filters package_key $package_key
     }
 
@@ -729,21 +729,21 @@
                     if {$elm eq "package_key" && [llength $val] > 1 && [lsearch $val $site_node($elm)] < 0} {
                         set passed_p 0
                         break
-                    } elseif {($elm ne "package_key" || [llength $val] == 1) && ![string equal $site_node($elm) $val]} {
+                    } elseif {($elm ne "package_key" || [llength $val] == 1) && $site_node($elm) ne $val } {
                         set passed_p 0
                         break
                     }
                 }
                 if { $passed_p } {
-                    if { ![empty_string_p $element] } {
+                    if { $element ne "" } {
                         lappend return_val $site_node($element)
                     } else {
                         lappend return_val $child_url
                     }
                 }
             }
         }
-    } elseif { ![empty_string_p $element] } {
+    } elseif { $element ne "" } {
         set return_val [list]
         foreach child_url $child_urls {
             array unset site_node
@@ -755,7 +755,7 @@
 
     # if we had filters or were getting a particular element then we 
     # have our results in return_val otherwise it's just urls
-    if { ![empty_string_p $element]
+    if { $element ne ""
          || [llength $filters] > 0} {
         return $return_val
     } else {
@@ -795,16 +795,16 @@
     @author Peter Marklund
 } {
     # Make sure we have a url to work with
-    if { [empty_string_p $url] } {
-          if { [empty_string_p $node_id] } {
+    if { $url eq "" } {
+          if { $node_id eq "" } {
               set url "/"
           } else {
               set url [site_node::get_url -node_id $node_id]
           }
     }
 
     # should we return the package at the passed-in node/url?
-    if { $include_self_p && ![empty_string_p $package_key]} {
+    if { $include_self_p && $package_key ne ""} {
         array set node_array [site_node::get -url $url]
 
         if { [lsearch -exact $package_key $node_array(package_key)] != -1 } {
@@ -813,15 +813,15 @@
     }
 
     set elm_value {}
-    while { [empty_string_p $elm_value] && $url != "/"} {
+    while { $elm_value eq "" && $url ne "/"} {
         # move up a level
         set url [string trimright $url /]
         set url [string range $url 0 [string last / $url]]
         
         array set node_array [site_node::get -url $url]
 
         # are we looking for a specific package_key?
-        if { [empty_string_p $package_key] || \
+        if { $package_key eq "" || \
                  [lsearch -exact $package_key $node_array(package_key)] != -1 } {
             set elm_value $node_array($element)
         }       
@@ -865,7 +865,7 @@
     set existing_urls [site_node::get_children -node_id $parent_node_id -element name]
     
     array set parent_node [site_node::get -node_id $parent_node_id]
-    if { ![empty_string_p $parent_node(package_key)] } {
+    if { $parent_node(package_key) ne "" } {
         # Find all the page or directory names under this package
         foreach path [glob -nocomplain -types d "[acs_package_root_dir $parent_node(package_key)]/www/*"] {
             lappend existing_urls [lindex [file split $path] end]
@@ -881,10 +881,10 @@
         }
     } 
 
-    if { ![empty_string_p $folder] } {
+    if { $folder ne "" } {
         if { [lsearch $existing_urls $folder] != -1 } {
             # The folder is on the list
-            if { [empty_string_p $current_node_id] } {
+            if { $current_node_id eq "" } {
                 # New node: Complain
                 return {}
             } else {
@@ -899,7 +899,7 @@
         }
     } else {
         # Autogenerate folder name
-        if { [empty_string_p $instance_name] } {
+        if { $instance_name eq "" } {
             error "Instance name must be supplied when folder name is empty."
         }
 
@@ -953,7 +953,7 @@
     db_transaction {
         site_node::unmount -node_id $node_id
 
-        if {[string equal $delete_p t]} {
+        if {$delete_p == "t"} {
             site_node::delete -node_id $node_id
         }
     }
@@ -1014,7 +1014,7 @@
 
     @see site_node::closest_ancestor_package
 } {
-    if {[empty_string_p $url]} {
+    if {$url eq ""} {
         set url [ad_conn url]
     }
 
@@ -1027,7 +1027,7 @@
     }
     
     # Add a trailing slash and try again.
-    if {[string index $url end] != "/"} {
+    if {[string index $url end] ne "/"} {
           append url "/"
           if {[catch {nsv_get site_nodes $url} result] == 0} {
               array set node $result
@@ -1038,14 +1038,14 @@
     }
     
     # Try successively shorter prefixes.
-    while {$url != ""} {
+    while {$url ne ""} {
           # Chop off last component and try again.
           set url [string trimright $url /]
           set url [string range $url 0 [string last / $url]]
         
           if {[catch {nsv_get site_nodes $url} result] == 0} {
               array set node $result
-              if {$node(pattern_p) == "t" && $node(object_id) != "" && [lsearch -exact $package_keys $node(package_key)] != -1 } {
+              if {$node(pattern_p) == "t" && $node(object_id) ne "" && [lsearch -exact $package_keys $node(package_key)] != -1 } {
                     return $node(package_id)
               }
           }
@@ -1070,7 +1070,7 @@
 
     @see site::node::closest_ancestor_package
 } {
-    if {[empty_string_p $package_key]} {
+    if {$package_key eq ""} {
         set package_key [subsite::package_keys]
     }
 
@@ -1079,7 +1079,7 @@
                             -package_key $package_key \
                             -url [ad_conn url] ]
 
-    if {[empty_string_p $subsite_pkg_id]} {
+    if {$subsite_pkg_id eq ""} {
         # No package was found... return the default
         return $default
     }
Index: openacs-4/packages/acs-tcl/tcl/text-html-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/text-html-procs.tcl,v
diff -u -r1.64 -r1.65
--- openacs-4/packages/acs-tcl/tcl/text-html-procs.tcl	12 Jul 2009 01:08:31 -0000	1.64
+++ openacs-4/packages/acs-tcl/tcl/text-html-procs.tcl	11 Mar 2010 11:20:48 -0000	1.65
@@ -857,11 +857,11 @@
         #     - alpha or
         #     - a slash, and then alpha
         # Otherwise, it's probably just a lone < character
-        if { $i >= [expr $length-1] || \
-                 (![string is alpha [string index $html [expr $i + 1]]] && \
+        if { $i >= [expr {$length-1}] || \
+                 (![string is alpha [string index $html [expr {$i + 1}]]] && \
 		      [string index $html [expr {$i + 1}]] ne "!" && \
-                      (![string equal "/" [string index $html [expr $i + 1]]] || \
-                           ![string is alpha [string index $html [expr $i + 2]]])) } {
+                      (![string equal "/" [string index $html [expr {$i + 1}]]] || \
+                           ![string is alpha [string index $html [expr {$i + 2}]]])) } {
             # Output the < and continue with next character
             ad_html_to_text_put_text output "<"
             set last_tag_end [incr i]