[gopher] MacOS X and Solaris fixes

[John Goerzen <jgoerzen@xxxxxxxxxxxx>]

Hello,

After having one run-in after another with the regex code in the gopher 
tree, I finally replaced it -- rewritten from scratch.

The new code is checked into CVS.  It fixes the gopherd problems on 
MacOS X, and I'm hopeful that it will fix compilation problems on 
Solaris.

The code has been updated to work with current POSIX regex standards.  
Additionally, it will use those functions by default if they are 
available, falling back on other methods only if they are missing.

-- John