Issue #19352: Fix unittest discovery when a module can be reached through several paths (e.g. under Debian/Ubuntu with virtualenv).

Patch by Sunny K.

Issue #15207: Fix mimetypes to read from correct area in Windows registry (Original patch by Dave Chambers)

Python executable and not removed by the linker's optimizer.

limiting the call to readline().  Original patch by Michał
Jastrzębski and Giampaolo Rodola.

Patch by David Edelsohn.

Fix inaccurate versionchanged tag for compressobj(): most parameter were there, just got kwarg support.

Skip tests for 24-bit wave file on big-endian platforms.