Do the dump file Capsicum stuff in a common routine.

Do the dump file Capsicum stuff in a common routine.

We were doing the same stuff in two places and *almost* the same stuff
in a third place, which should have been doing the same stuff.  Put that
stuff into a common routine and just use that.

(What a mess.  If you pour a bottle of Capsicum on your OS, it seeps all
throughout the system; might as well admit it and, at least, extend the
standard I/O library to handle it a bit better.)