python: bump all USE_PYTHON=distutils consumers after RUN_DEPENDS removal

Any missed ports, feel free to bump.

Any ports that need setuptools at runtime can have the devel/py-setuptools
manually added back to RUN_DEPENDS, but understand that this practice
is deprecated; see CHANGES for details.

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

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.

edtors/py-pynvim: Update to 0.4.3

PR:		254925
Approved by:	maintainer

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

Remove # $FreeBSD$ from Makefiles.

Remove py27_*_DEPENDS lines from ports using Python 3.6+ only.

While here adjust a related comment in graphics/py-traitsui

Drop python 2.7 support from a few ports

With hat:	portmgr

editors/py-pynvim: Update to 0.4.2

PR:		250991
Approved by:	maintainer

py-pynvim: Update to 0.4.1

PR:		246900
Approved by:	maintainer

editors/py-pynvim: update to 0.4.0

[1]
https://github.com/neovim/pynvim/commit/f04853121de564ac03b981a984595ea33331ad3e

PR:		242065
Submitted by:	Thomas Merkel <tm@NetBSD.org>  (maintainer), koobs [1]

Convert to UCL & cleanup pkg-message (categories e-g)

Remove neovim from TEST_DEPENDS, and original submitter becomes maintainer

My intention is to add an OPTION for pynvim to the neovim port, which
means that this port cannot depend upon neovim. Change do-test to a
maintainer-test target that gives some instructions.

Also, per original PR and at request of 0mp, pass maintainership to
Thomas Merkel, the submitter of the original py-pynvim PR.

PR:		236571
Approved by:	0mp

New port: editors/py-pynvim: Python client and plugin host for Neovim

Pynvim implements support for python plugins in Nvim. It also works as a
library for connecting to and scripting Nvim processes through its
msgpack-rpc API.

WWW: https://pynvim.readthedocs.io/en/latest/

Reviewed by:	mat
Approved by:	mat (mentor)
Differential Revision:	https://reviews.freebsd.org/D19597