[pacman-dev] [PATCH] Use openssl for checksum verification instead of *sum utilities

[Sebastian Nowicki]

Good news, it turns out that openssl does support sha256, sha386 and
sha512, it just wasn't documented in the man page. `openssl dgst --help`
does document them, and the are available on BSD and Linux, so that's
great. In the previous patch I forgot to remove the check for the
existence *sum program. Makepkg now checks if openssl exists.

The only downside I can see is that openssl is a ~7mb dependency, but at
least it's in core.