devel/py-python-dateutil: Move devel/py-dateutil to devel/py-python-dateutil

- Convert to USE_PYTHON=pep517
- Bump PORTREVISION of dependent ports for dependency change
- While I'm here, update audio/py-pyradio to use PYTHON_PKGNAMEPREFIX instead of
PKGNAMEPREFIX for *_DEPENDS

*: Replace USES=pycryptography* with USE_PYTHON=cryptography{,_build,_test}

- Introduce USE_PYTHON=cryptography{,_build,_test}
- Switch all 96 ports from USES=pycryptography to with
USE_PYTHON=cryptography{,_build,_test}
- Remove Mk/Uses/pycryptography.mk

PR:		273727
Approved by:	tcberner (portmgr)
Exp-run by:	antoine

framework: convert tree to use USES=pycryptography

A future commit will update to security/py-cryptography will introduce a
rust dependency.

PR:		254853

all: remove explicit versions in USES=python for "3.x+"

The logic in USES=python will automatically convert this to 3.8+ by
itself.

Adjust two ports that only had Python 3.7 mentioned but build fine
on Python 3.8 too.

finance/quickfix: mark BROKEN with PYTHON

libtool: compile:  c++ -DHAVE_CONFIG_H -I. -I../.. -I -I. -I.. -I../.. -I../C++
-DLIBICONV_PLUG -DPYTHON_MAJOR_VERSION=3 -Wno-unused-variable
-Wno-maybe-uninitialized -O2 -pipe -DLIBICONV_PLUG -fstack-protector-strong
-fno-strict-aliasing -DLIBICONV_PLUG -Wall -ansi
-Wno-unused-command-line-argument -Wpointer-arith -Wwrite-strings
-Wno-overloaded-virtual -Wno-deprecated-declarations -Wno-deprecated -std=c++0x
-MT _quickfix_la-QuickfixPython.lo -MD -MP -MF
.deps/_quickfix_la-QuickfixPython.Tpo -c QuickfixPython.cpp  -fPIC -DPIC -o
.libs/_quickfix_la-QuickfixPython.o
warning: unknown warning option '-Wno-maybe-uninitialized'; did you mean
'-Wno-uninitialized'? [-Wunknown-warning-option]
QuickfixPython.cpp:175:11: fatal error: 'Python.h' file not found
          ^~~~~~~~~~
1 warning and 1 error generated.

Reviewed by:	portmgr, vishwin, yuri
Differential Revision:	<https://reviews.freebsd.org/D40568>

*/*: rename CHEESESHOP to PYPI in MASTER_SITES

PR:			267994
Differential revision:	D37518
Approved by:		bapt

www/py-azure-storage: Add NO_ARCH

Approved by:	portmgr (blanket)

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Drop python 2.7 support from a few ports

With hat:	portmgr

Use PY_FLAVOR for dependencies.

FLAVOR is the current port's flavor, it should not be used outside of
this scope.

Sponsored by:	Absolight

Switch all pypi.python.org WWWs to a new PyPi home pypi.org where
they now redirect to anyway. All new urls checked to return 200,
I've fixed a couple of them in the process.

Approved by:	portmgr blanket, mat

www/py-azure-storage: Python Client for Azure Storage

Microsoft Azure Storage SDK for Python provides a client library in Python
that makes it easy to consume Microsoft Azure Storage services.

WWW: https://pypi.python.org/pypi/azure-storage

Submitted by:	Vladimir Vinogradenko