Add Joerg's user management screen for David Nugent's pw(8) program, something

Add Joerg's user management screen for David Nugent's pw(8) program, something
which will also need to be brought in before this screen will work.

Add some commentary about how the slip startup code is bogus.

Steal Joerg's loop for more properly closing all files and graft it into
the EHS startup.  My loop was functional but more bogus.