Log Message:
o Add proper comments in order to document all hacks, workarounds, etc.
o Do not ignore custom CFLAGS and LDFLAGS, this will eventually make the add
  of pkgsrc option much more easier.
o Avoid the ugly workaround to provide DESTDIR support, it's better to do it
  fixing installsome() function in ${WRKSRC}/build/unix/build_functions. Now
  ${WRKSRC}/build.sh honors DESTDIR environment variable.
  This should also fixes the paths in the ${PREFIX}/bin/uqm wrapper script.

An huge thank you to wiz@ that kindly reported me the latter problem in
private mails.
PKGREVISION++