Fix typos caused by global edit.

Amends: r2472

git-svn-id: svn://daper.net/moc/trunk@2627 910807d9-36e0-0310-a014-e9ea483e2ba4
Fix screen upset caused by screen(1) mis-detection.

A new configuration option, 'ScreenTerms', has been introduced which
parallels the existing 'XTerms' option.

Resolves: node/880 (MOCP interface glitching)

git-svn-id: svn://daper.net/moc/trunk@2628 910807d9-36e0-0310-a014-e9ea483e2ba4