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 -N -r1.82 -r1.83
--- openacs-4/packages/acs-tcl/tcl/security-procs.tcl	17 Dec 2017 19:54:35 -0000	1.82
+++ openacs-4/packages/acs-tcl/tcl/security-procs.tcl	3 Jan 2018 13:28:21 -0000	1.83
@@ -701,6 +701,14 @@
     register/unregister should be performed. If there is no current
     connection, the main site url is returned.
 
+    TODO: util_current_location and security::get_register_subsite
+    can be probably cached, when using the following parameters in
+    the cache key:
+       - host header field
+       - [ns_conn location]
+       - ...
+    also [security::get_register_subsite] could/should be cached
+    
     @author Gustaf Neumann
 } {