open_flags which contains the flags supported by gdbm.  Closes patch
#102802.

This should match the situation in the 1.6b1 tree.

Convert to using PyArg_ParseTuple() as appropriate to allow method names
in error messages.
Re-indent to four-space indentation.

For more comments, read the patches@python.org archives.
For documentation read the comments in mymalloc.h and objimpl.h.

(This is not exactly what Vladimir posted to the patches list; I've
made a few changes, and Vladimir sent me a fix in private email for a
problem that only occurs in debug mode.  I'm also holding back on his
change to main.c, which seems unnecessary to me.)

PyArg_ParseTuple() format string arguments as possible.

database is closed.  Raise gdbm.error instead.

Bug report #198 submitted by Barry Haddow <bhaddow@orbism.com>.

on BeOS or Windows.

Also got rid of some inconsistent change log comments near the top.

(1) Use PyErr_NewException("module.class", NULL, NULL) to create the
    exception object.

(2) Remove all calls to Py_FatalError(); instead, return or
    ignore the errors -- the import code now checks PyErr_Occurred()
    after calling a module's init function, so it's no longer a
    fatal error for the initialization to fail.

Also did some small cleanups, e.g. removed unnecessary test for
"already initialized" from initfpectl(), and unified
initposix()/initnt().

I haven't checked this very thoroughly, so while the changes are
pretty trivial -- beware of untested code!

GDBM module.

Setup.in: clarified Tk comments somewhat.
structmodule.c: use memcpy() instead of double precision assignment.

struct.

	Anthony Baxter's gdbm module (derived from Jack's dbm module)

* Stubs for faster implementation of local variables (not yet finished)
* Added function name to code object.  Print it for code and function
  objects.  THIS MAKES THE .PYC FILE FORMAT INCOMPATIBLE (the version
  number has changed accordingly)
* Print address of self for built-in methods
* New internal functions getattro and setattro (getattr/setattr with
  string object arg)
* Replaced "dictobject" with more powerful "mappingobject"
* New per-type functio tp_hash to implement arbitrary object hashing,
  and hashobject() to interface to it
* Added built-in functions hash(v) and hasattr(v, 'name')
* classobject: made some functions static that accidentally weren't;
  added __hash__ special instance method to implement hash()
* Added proper comparison for built-in methods and functions

Added new module dbm (interface to ndbm).