! that message should only show when no db interfaces have been found

Signed-off-by: Spuds <spuds@spudsdesign.com>
! mask unlink error
! add / improve function docs

Signed-off-by: Spuds <spuds@spudsdesign.com>
Merge pull request #1554 from Spuds/other

A few more annoyances