Fix random build failure.
Because scripts/dkimproxy.out is patched, its timestamp may be after the
one of scripts/dkimproxy_out.8, forcing a rebuild of the man page.
- The Makefile are generated with autotools, and need gmake
- Fix some syntax error in dkimproxy.out's pod section.
While there, regenerate patches.
Reported by: pkg-fallout
Sponsored by: Absolight