Add environment variables section to the manpage.

git-svn-id: svn://daper.net/moc/trunk@2733 910807d9-36e0-0310-a014-e9ea483e2ba4
Replace GNU getopt with POPT.

git-svn-id: svn://daper.net/moc/trunk@2734 910807d9-36e0-0310-a014-e9ea483e2ba4
Group command line options in help display.

git-svn-id: svn://daper.net/moc/trunk@2735 910807d9-36e0-0310-a014-e9ea483e2ba4
Add support for MOCP_OPTS environment variable.

git-svn-id: svn://daper.net/moc/trunk@2736 910807d9-36e0-0310-a014-e9ea483e2ba4