Patch by Eric Snow.

allocating path buffers on the heap instead of the stack.

(Patch by Dionysios Kalofonos)

Closes #14250: regex.flags has not only explicit flags but also implicit flags and those from the pattern

3.2 explain json.dumps for non-string keys in dicts. closes issue6566. Patch contributed Kirubakaran Athmanathan

Original patch by Steffen Daode Nurpmeso

Patch by Florian Mladitsch

Patch by Dylan Sarber.

using --with-system-expat working when the system expat does not have
salted hash support.

Transplant from main repo d6c197edd99b: Fixes Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes

using --with-system-expat working when the system expat does not have
salted hash support.

- change references from configure.in to configure.ac

in the hash table internal to the pyexpat module's copy of the expat
library to avoid a denial of service due to hash collisions.
Patch by David Malcolm with some modifications by the expat project.