[RFA 00/23] More miscellaneous C++-ification

[Tom Tromey]

This is a series of random C++-ification.  There's no real rhyme or
reason to my approach, except that one goal was to remove the
remaining cleanups from the Python code.

I regtested this using the buildbot.  Individual patches note
potential problems that I'm aware of.

In some cases perhaps the C++-ification is too shallow.  I think the
changes represent an improvement regardless, due to generally removing
cleanups and shrinking the code.  But, if you're concerned about that,
it's usually no trouble to drop an individual patch.

Tom