nsf.c

Improved Tcl 9.0.0 compatibility
One needs 'Tcl_InitStubs(interp, "8.5-",...)' instead of
'Tcl_InitStubs(interp, "8.5",...)', since the semantics are seemingly
the same as in "package require ...". Not sure, why we have not seen
this with earlier pre-releases of Tcl9.

Without this change, we see in the NaviServer regression test the following error message:

[27/Sep/2024:10:56:30][18309.7f35ed856540][-main:test-] Error: version conflict for package "tcl": have 9.0.0, need 8.5
: version conflict for package "tcl": have 9.0.0, need 8.5
: while executing
: "load {} Nsf"
: invoked from within
: "ns_ictl update"
: (procedure "ns_cleanup" line 8)
: invoked from within