Patch by Marc Abramowitz.

  AC_PATH_PROG and AC_CHECK_PROGS for the target tools.

  global host_platform instead.

the Ctrl-C signal handler on Windows

the Ctrl-C signal handler on Windows

Patch by Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch by Jakub Wilk.

Patch by Jakub Wilk.

Now that rmdir supports dir_fd, we also use it. Attackers can't even delete
empty directories anymore.

If messages were only added, a new file is no longer created and
renamed over the old file when flush() is called on an mbox, MMDF or
Babyl mailbox.

If messages were only added, a new file is no longer created and
renamed over the old file when flush() is called on an mbox, MMDF or
Babyl mailbox.

Also added several regression tests.

os.urandom() has now one unique implementation, posix_urandom() which
calls _PyOS_URandom(). _PyOS_URandom() uses RAND_pseudo_bytes() on VMS.

Use 'srcdir' from sysconfig instead of 'projectbase' to build a
path to the Tools directory.  'projectbase' is the path of the build
directory, not the source directory.

The gdb hooks for debugging CPython (within Tools/gdb) have
been enhanced to show information on more C frames relevant to CPython within
the "py-bt" and "py-bt-full" commands:
  * C frames that are waiting on the GIL
  * C frames that are garbage-collecting
  * C frames that are due to the invocation of a PyCFunction

(helps getting results in real-time when stdio is transmitted over a pipe or socket)