radio() and radioSet() sanitize HTML attribute values.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5153 2fea6a4d-a838-0410-917b-93a53c48e9d2
fInput() should start rendered output with a linefeed.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5154 2fea6a4d-a838-0410-917b-93a53c48e9d2
Define $out.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5155 2fea6a4d-a838-0410-917b-93a53c48e9d2