[flac-dev] Upstreaming Gentoo patches

[David Seifert]

Dear FLAC devs,
I would like to get some of our patches merged into master. Most
of them deal with adhering to GNU conventions, respectively not
overriding flags/variables that are up to the user to set. For instance,
honoring $(htmldir) is important, as we have installation paths for the
documentation that differ from what is currently coded in the various
Makefile.am's.

Regards
David Seifert