extension modules.

Pascal-strings. Safer, because Pstring converts in-place and the
pathname may be reused later for error messages.

This should match the situation in the 1.6b1 tree.

has a few slightly different calls from the old one.

If we attempt to import a dynamic module in a newer (or older) version
of Python give an error message tailored to the situation (Python too
new/old).

* in import.c, #ifdef out references to dynamic loading based on
  HAVE_DYNAMIC_LOADING

* clean out the platform-specific crud from importdl.c.
  [ maybe fold this function into import.c and drop the importdl.c file? Greg.]

* change GetDynLoadFunc's "funcname" parameter to "shortname". change
  "name" to "fqname" for clarification.

* each GetDynLoadFunc now creates its own funcname value.

  WARNING: as I mentioned previously, we may run into an issue with a
  missing "_" on some platforms. Testing will show this pretty quickly,
  however.

* move pathname munging into dynload_shlib.c

file per platform (really: per style of Dl API; e.g. all platforms
using dlopen() are grouped together in dynload_shlib.c.).

This is part of a set of patches by Greg Stein.