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.

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

devel/py-pymaven-patch: Update to 0.3.0

Changelog:

https://github.com/sassoftware/pymaven/compare/4e065e4...nexB:0.3.0

devel/py-pymaven-patch: Update to 0.2.9

* Switch from GitHub to PyPI as upstream now offers Python sdists

* Python 3 is now supported so remove the version contraints

* Use pytest for running the tests as it's already required as a dependency
  to process them thus make real use of that tool

* Pet portlint (whitespace issue in pkg-descr)

Changelog:

https://github.com/nexB/pymaven/compare/3caf65f...4e065e4

Change my maintainer email address to my new one at the FreeBSD project.

Reviewed by:	miwi (mentor)
Approved by:	miwi (mentor)
Differential Revision: https://reviews.freebsd.org/D19050

pymaven is a library for working with maven repositories via python. pymaven is
not intended as a complete replacement of the maven build system, but instead as
a way for python programs to fetch artifacts and artifact dependencies from
maven2 repositories.

Note: This is a forked version from the 2.x branch that supports unicode and
      uses other routines for data structures.

WWW: https://github.com/nexB/pymaven

PR:		229498
Submitted by:	freebsd_ports@k-worx.org
Sponsored by:	iXsystems Inc.