Mark pkgsrc frozen.
Update grepcidr to version 2.95.  It's now distributed as a tarball,
so we don't have to download each file individually; a bug in command
line argument parsing has been fixed, and an incorrect size has been fixed
in a malloc call.
Updated textproc/grepcidr to 2.95 [apb 2013-12-16]
Add missing half of the Darwin patch.