posix module ImportError cause the nt module import to fail.

from is modified during the lifetime of the Python process after
zipimport has already opened and cached the zip's table of contents
it now fstat's the file after opening it upon every attempt to access
anything within and will re-read the table of contents if the .zip file
inode, size or mtime have changed.

It would've been nicer to hold any .zip file used by zipimport open for the
duration of the process but that would be more invasive and add an additional
open file descriptor to all zipimport using processes.  It also would likely
not fix the problem on Windows due to different filesystem semantics.

Patch by Akira Kitada.

The fix the test is testing prevents a DOS attack, and the failure
mode will also prevent the DOS attack, so for now skip the test.
Either the test or the code does need fixing, however.

Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl module, rather than silently let them emit clear text data.

array.fromfile() works only with file objects, not io.FileIO instances.

Patch by Gennadiy Zlobin.

methods.

the uncompress buffer and read() goes through more than one readbuffer.

This is partial backport of changeset 028e8e0b03e8.

from X.org distribution using makelocalealias.py.

Initial patch by Ajitesh Gupta.

locale encodings with hyphens.

(wrong type).

quotechar fields.  Original patch by Vajrasky Kok.