[gamin] Building gamin on Solaris

[Doug Scott <dougs truemail co th>]

Hi,
  I needed to build gamin for xfce on Open Solaris (using Sun Studio). 
From this I have a some patches if anybody is interested.

Doug

A summary of the changes are -

   * configure.in: needs to test for -lsocket and -lnsl
   * libgamin/gam_api.c and server/gam_channel.c: ported to use 
getpeerucred
      Also updated configure.in to test for ucred.h and getpeerucred in 
libc.so
   * server/gam_fs.c: Change to use /etc/mnttab on Solaris rather than 
/etc/mtab
      Also updated configure.in to test for sys/mnttab.h
      Added gam_fs_set for ufs,zfs,vxfs filesystems if on Solaris
   * server/gam_server.c: Change function call from 
gam_poll_generic_init to gam_poll_basic_init
   * libgamin/gamin_sym.version: needed to remove FAMDebugLevel and 
FAMDebug as ld complained
      that they did not exist.
   * several configure related files: Solaris ld used -Mmapfile rather 
than --version-script=mapfile