sysutils/shuf: Update to 3.0

[0mp]

Summary

• Set WWW to the GitHub repository, the old homepage seems down.
• Install the manual page to share/man/man1
• Mention that this utility is a reimplementation of the GNU shuf tool.

Test Plan

Builds in poudirere just fine.

[tobik]

sysutils/shuf/Makefile

14–15

From the README

Tarballs are available under the Releases tab. Please use the versioned tarball instead of the auto-generated tarballs.

The release tarball is here:
https://github.com/ibara/shuf/releases/download/shuf-3.0/shuf-3.0.tar.gz

[tobik]

sysutils/shuf/Makefile

16

I'm packaging mg and oksh from ibara too and this should probably be HAS_CONFIGURE since he doesn't use autotools.

[0mp]

Thanks for the comments, @tobik. I've fixed those issues in another commit :)