Bugzilla Bug 67045

I've modified the ebuild for uqm-3.0-r2 so that optional packages (3domusic,
voices, remixes) will not be downloaded unless the proper local USE flags are
used. The optional packages are quite large downloads, and are not required at
all to play, so users on slower connections might appreciate not having to
download them. Additionally the ebuild will install the third music remix
package (the previous ebuild only did the first two).

This might be considered hairy, because the optional URIs are present or
omitted in SOURCE_URI based on USE flags (specifically, the "music" "voice" and
"remix" flags). I haven't seen any other ebuilds that do this, but maybe I just
haven't looked long enough. Note that in order for the digests to be made for
ALL the files, these optional USE flags ("music voice remix") should be
specified when making the digest.

Additionally, if some flags were not specified, my ebuild is supposed to print
out a message in postinst that says which flags were not given, what they do,
and how to give them (and a warning about download sizes). I think the message
works correctly, but I'm uncertain of by bash scripting skills, so it would be
prudent for someone to check that over.

Reproducible: Always
Steps to Reproduce:

Created an attachment (id=41501) [edit]
New more flexible ebuild

Oops, like a fool I forgot to check that my recent, minor changes actually
worked. Portage reports that there is an error in the ebuild. Just a heads-up
while I fix it.

Hrmmm, the ebuild seems to work right, with no errors, for any combination of
the USE flags I give it. The error I saw before was during an "emerge -Dup
world", but my box was somewhat broken at the time, and I haven't seen the
error again since then.

patched the ebuild in portage.  No rev bump since it's such a big download. 
Remerge to get the new use flag support and additional remix.