python3: Update to 3.8.4, refresh/rework patches, backport patches

This version includes fixes for:
* CVE-2020-14422: Hash collisions in IPv4Interface and IPv6Interface
* CVE-2020-15523: Python uses invalid DLL path after calling Py_SetPath
  on Windows

This version also includes support for OpenSSL 1.1.x builds that use
'no-deprecated' and '--api=1.1.0'[1], and so this removes the previous
OpenSSL-related patches.

This also backports fixes for security issues, including:
* CVE-2019-20907: Infinite loop in the tarfile module

This also updates the setuptools and pip packages to 47.1.0 and 20.1.1,
respectively.

[1]: https://github.com/python/cpython/pull/20566

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python/python3/patches-setuptools/002-sorted-requires.patch

@@ -5,10 +5,10 @@ Index: b/setuptools/command/egg_info.py
 ===================================================================
 --- a/setuptools/command/egg_info.py
 +++ b/setuptools/command/egg_info.py
-@@ -621,7 +621,7 @@ def warn_depends_obsolete(cmd, basename,
- def _write_requirements(stream, reqs):
-     lines = yield_lines(reqs or ())
-     append_cr = lambda line: line + '\n'
+@@ -641,7 +641,7 @@ def _write_requirements(stream, reqs):
+ 
+     def append_cr(line):
+         return line + '\n'
 -    lines = map(append_cr, lines)
 +    lines = map(append_cr, sorted(lines))
      stream.writelines(lines)