* 'master' of https://github.com/python/cpython: (601 commits)
remove check for bug last seem in Solaris 9 (python#3285)
Change code owners for hashlib and ssl to the crypto team (python#3284)
bpo-31281: Fix pathlib.Path incompatibility in fileinput (pythongh-3208)
remove autoconf check for select() (python#3283)
remove configure check for 'volatile' (python#3281)
Add missing _sha3 module to Setup.dist (python#2395)
bpo-12383: Also ignore __PYVENV_LAUNCHER__ (python#3278)
bpo-9146: add the missing NEWS entry. (python#3275)
Fix a c.f.as_completed() refleak previously introduced in bpo-27144 (python#3270)
bpo-31185: Fixed miscellaneous errors in asyncio speedup module. (python#3076)
remove a redundant lower in urllib.parse.urlsplit (python#3008)
bpo-31323: Fix reference leak in test_ssl (python#3263)
bpo-31250, test_asyncio: fix EventLoopTestsMixin.tearDown() (python#3264)
bpo-31326: ProcessPoolExecutor waits for the call queue thread (python#3265)
bpo-27144: concurrent.futures as_complete and map iterators do not keep reference to returned object (python#1560)
bpo-31250, test_asyncio: fix dangling threads (python#3252)
bpo-31217: Fix regrtest -R for small integer (python#3260)
bpo-30096: Use ABC in abc reference examples (python#1220)
bpo-30737: Update DevGuide links to new URL (pythonGH-3228)
[Trivial] Remove now redundant assert (python#3245)
...