Log Message:
python313: fix float detection on x86.

While here:
- remove partial HPUX support (no corresponding PLIST, so I don't see
  how this can work)
- remove libpanelw workaround - the configure script falls back to
  libpanel on its own
- remove workaround for opcodes.h - seems to work now
- allow network access for self tests
- remove references to non-existent files

Bump PKGREVISION.