[PATCH 0/8] Error handling cleanups

[Gary Benson <gbenson@redhat.com>]

Hi all,

GDB's various error handling functions do not work until a certain
amount of setup has been performed.  For regular warnings and errors
this is an annoyance: error handling needs to be hardwired with
fprintf and/or exit until error and warning may be called.  For
internal warnings and errors this is a real problem: internal errors
can occur from almost the first line of captured_main, but they don't
actually work until much later.

This series modifies internal_vproblem to always work, and modifies
warning and error to work much earlier.  It then replaces all the
hardwired early warning/error code with standard calls to warning and
error.

While looking at this I found several other hardwired error handlers
that do not seem to be necessary.  I've replaced those in separate
patches.

While switching to warning/error I've fixed some inconsistencies that
have crept in over time: some messages wern't wrapped with _(), for
example, and some but not all warning messages were prefixed with
argv[0].  For the latter case I've made it so that all warnings
emitted prior to and during option processing--before print_gdb_version
basically--are prefixed by argv[0] and all other warnings are not.

Built and regtested on RHEL6.5 x86_64.

Ok to commit?

Thanks,
Gary