Merge branch 'mk/tcsh-complete-only-known-paths'

The "complete with known paths only" update to completion scripts returns directory names without trailing slash to compensate the addition of '/' done by bash that reads from our completion result. tcsh completion code that reads from our internal completion result does not add '/', so let it ask our complletion code to keep the '/' at the end. * mk/tcsh-complete-only-known-paths: completion: handle path completion and colon for tcsh script