[Update] Python 3.9.5 -> 3.9.6

This is an update for Python 3.9

It includes one security fix and several others.

https://docs.python.org/release/3.9.6/whatsnew/changelog.html#changelog

Tests run okay for me.

ok?

(cc maintainer)

--Kurt

Index: Makefile
===================================================================
RCS file: /cvs/ports/lang/python/3.9/Makefile,v
retrieving revision 1.6
diff -u -p -r1.6 Makefile
--- Makefile 12 Jun 2021 04:00:22 -0000 1.6
+++ Makefile 9 Jul 2021 19:00:54 -0000
@@ -6,7 +6,7 @@
# Python itself.

VERSION = 3.9
-PATCHLEVEL = .5
+PATCHLEVEL = .6
SHARED_LIBS = python3.9 0.0
VERSION_SPEC = >=3.9,<3.10
#PSUBDIR = python/3.9.0
Index: distinfo
===================================================================
RCS file: /cvs/ports/lang/python/3.9/distinfo,v
retrieving revision 1.4
diff -u -p -r1.4 distinfo
--- distinfo 12 Jun 2021 04:00:22 -0000 1.4
+++ distinfo 9 Jul 2021 19:00:54 -0000
@@ -1,2 +1,2 @@
-SHA256 (Python-3.9.5.tgz) = 4PvVtuHuJCUkQw3uPJG69Mu6ukpy3RZ0uQ/ah7cTx6s=
-SIZE (Python-3.9.5.tgz) = 25627989
+SHA256 (Python-3.9.6.tgz) = 0KNRguGeQW/I6uJaPc1NAtSZczPkrR8u7mAQqtw/6GY=
+SIZE (Python-3.9.6.tgz) = 25640094
Index: pkg/PLIST-main
===================================================================
RCS file: /cvs/ports/lang/python/3.9/pkg/PLIST-main,v
retrieving revision 1.5
diff -u -p -r1.5 PLIST-main
--- pkg/PLIST-main 12 Jun 2021 04:00:22 -0000 1.5
+++ pkg/PLIST-main 9 Jul 2021 19:00:55 -0000
@@ -1853,7 +1853,7 @@ lib/python3.9/ensurepip/_bundled/__pycac
lib/python3.9/ensurepip/_bundled/__pycache__/__init__.cpython-39.opt-1.pyc
lib/python3.9/ensurepip/_bundled/__pycache__/__init__.cpython-39.opt-2.pyc
lib/python3.9/ensurepip/_bundled/__pycache__/__init__.cpython-39.pyc
-lib/python3.9/ensurepip/_bundled/pip-21.1.1-py3-none-any.whl
+lib/python3.9/ensurepip/_bundled/pip-21.1.3-py3-none-any.whl
lib/python3.9/ensurepip/_bundled/setuptools-56.0.0-py3-none-any.whl
lib/python3.9/ensurepip/_uninstall.py
lib/python3.9/enum.py
@@ -2053,9 +2053,9 @@ lib/python3.9/lib-dynload/
@so lib/python3.9/lib-dynload/zlib.cpython-39.so
lib/python3.9/lib2to3/
lib/python3.9/lib2to3/Grammar.txt
-lib/python3.9/lib2to3/Grammar3.9.5.final.0.pickle
+lib/python3.9/lib2to3/Grammar3.9.6.final.0.pickle
lib/python3.9/lib2to3/PatternGrammar.txt
-lib/python3.9/lib2to3/PatternGrammar3.9.5.final.0.pickle
+lib/python3.9/lib2to3/PatternGrammar3.9.6.final.0.pickle
lib/python3.9/lib2to3/__init__.py
lib/python3.9/lib2to3/__main__.py
lib/python3.9/lib2to3/__pycache__/