Patch from Upendra Kumar.

Add another try/except PermissionError to avoid depending on listdir order. Fix issues #24120 and #26012.

Simplify str.find explaination as per Georg Brandl's suggestion.

values and meaning.

Patch contributed by Andrew Scheller.

getaddrinfo takes an exclusive lock on some platforms, causing clients to queue
up waiting for the lock if many names are being resolved concurrently. Users
may want to handle name resolution in their own code, for the sake of caching,
using an alternate resolver, or to measure DNS duration separately from
connection duration. Skip getaddrinfo if the "host" passed into
create_connection is already resolved.

See https://github.com/python/asyncio/pull/302 for details.

Patch by A. Jesse Jiryu Davis.

parameter to "enable" the always on sys.flags.hash_randomization
in _args_from_interpreter_flags() used by multiprocessing and
some unittests.  This simplifies the code.