Interned pathnames propagating bad information

[Daniel L. Weinreb <dlw at SCRC-TENEX>]

I agree that Zwei should assume that any file without an explicit
Package property in its -*- line is in the User package.  I have seen
people bitten by this several times.  Perhaps the right way to do this
is to have the file-property-list parser always put in a Package
property, defaulting to User if there isn't actually any Package
property in the line, rather than putting the change into Zwei itself.

And Set Package should certainly change the file plist as well as the
editor's idea.  I'd even like to see it change the -*- line in the
buffer.  It is a real pain having this information around in many
different places and forms and having to copy it from one to the other,
since it can become inconsistent so easily.