Changes to test in configure if capabilities are enabled on a system.

Changes to test in configure if capabilities are enabled on a system.
Changes to get Samba to compile cleanly with the IRIX compiler
with the options : -fullwarn -woff 1209,1174 (the -woff options
are to turn off warnings about unused function parameters and
controlling loop expressions being constants).
Split prototype generation as we hit a limit in IRIX nawk.
Removed "." code in smbd/filename.c (yet again :-).
Jeremy.
(This used to be commit e0567433bd72aec17bf5a54cc292701095d25f09)