Issue #16096: Fix several occurrences of potential signed integer overflow.  Thanks Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch by Serhiy Storchaka.

Patch by Berker Peksag.

Closes #11710: create "landing pages" (/library/package.html) for those packages that have no documented content themselves, e.g. "urllib" or "http".

Original patch by Filip Gruszczyński.

Issue #16133: add Windows project file for _sha3 module. I choose to build _sha3 as a sparat module as it's rather large (190k for AMD64).

not written into an ASCII string

Merge issue #16115: Add test for check that executable arg to Popen() takes precedence over args[0] arg\n                            \n                            Patch by Kushal Das

Issue #16115: Add test for check that executable arg to Popen() takes precedence over args[0] arg\n                            \n                            Patch by Kushal Das

Patch by Roger Serwy

MERGE: #16112: platform.architecture does not correctly escape argument to /usr/bin/file. Fix original patch