Documentation updates related to the addition of openpty() and forkpty().

Perfect hash table generator. Outputs a Python extension module
which provides access to the hash table (which is stored in static
C data) using custom code.

This module can currently only generates code for the ucnhash
module, but can easily be adapted to produce perfect hash tables
for other tasks where fast lookup in large tables is needed.

By Bill Tutt.

Generator for the new ucnhash module (ucnhash.h|c). Uses perfect_hash.py
to create the ucnhash module.

Utility extension module needed by perfect_hash.py

By Bill Tutt.

Patch to the standard unicode-escape codec which dynamically
loads the Unicode name to ordinal mapping from the module
ucnhash.

By Bill Tutt.

Added new ucnhash module by Bill Tutt.

Added new ucnhash module.

Updated test output.

Added tests for the new Unicode character name support in the
standard unicode-escape codec.

This patch adds the openpty() and forkpty() library calls to posixmodule.c,
when they are available on the target
system. (glibc-2.1-based Linux systems, FreeBSD and BSDI at least, probably
the other BSD-based systems as well.)

Lib/pty.py is also rewritten to use openpty when available, but falls
back to the old SGI method or the "manual" BSD open-a-pty
code. Openpty() is necessary to use the Unix98 ptys under Linux 2.2,
or when using non-standard tty names under (at least) BSDI, which is
why I needed it, myself ;-) forkpty() is included for symmetry.

MSVC project file for the new module ucnhash. This may have to
be added to pcbuild.dsw with an dependancy on python16.

By Bill Tutt.

New ucnhash module by Bill Tutt. This module contains the hash
table needed to map Unicode character names to Unicode ordinals
and is loaded on-the-fly by the standard unicode-escape codec.

Exports the C API of the new ucnhash module.

By Bill Tutt.

based on response from Frank Stajano <fstajano@uk.research.att.com>.

based on comments from Frank Stajano <fstajano@uk.research.att.com>.

<skip@mojam.com>.  Revisions to the markup to make it pass LaTeX, added
an index entry and a reference from the sys.exitfunc documentation.

This closes SourceForge patch #100620.

Better error message for "1 in unicodestring". Submitted
by Andrew Kuchling.

noted the minimum recommended version in the message.

Various minor fixes

'link_shared_object()'.

methods (but not 'link_executable()', hmmm).  Currently only used by
BCPPCompiler; it's a dummy parameter for UnixCCompiler and MSVCCompiler.

Also added 'bcpp' to compiler table used by 'new_compiler()'.

Two major points:
  * lots of overlap with MSVCCompiler; the common code really should be
    factored out into a base class, say WindowsCCompiler
  * it doesn't work: weird problem spawning the linker (see comment for
    details)

  command objects.
Various formatting tweaks, typo fixes in comments.

Define a STRICT_SYSV_CURSES macro on SGI, Sun, and Tru64, to mark systems
that don't support some features.

getmouse(), ungetmouse(), and window.enclose().  wmouse_trafo() seems
of marginal importance at the moment.

Ditched my old code that fixed relative paths in the Makefile -- didn't work,
  doomed to failure, etc.

the 'implib_dir' attribute is back (only on NT, of course).

Also supposedly made some change to where .lib files wind up under MSVC++,
  but I don't understand how to code is doing what Thomas says it's
  doing.

Added 'check_lib()', which provides a subset of the functionality of
  'check_func()' with a simpler interface and implementation.