PyQt: Update sip to 6.5.0, reintroduce sip4 and simplify PyQt framework.

SIP:
As mentioned in the update from sip to sip5, this is a transitional version
to remove what is deprecated in sip4.
Sip6 completely removes the deprecated parts.
Unfortunately, some ports — mostly cura things — can not use sip6, so we
reintroduce sip4.

PyQt:
At the same time, we took the opportunity to simplify PyQT and propose only one
package as for devel/pyside2. */py-qt5-* have been merged — excepted chart,
networkauth and webengine — into devel/py-qt5-pyqt.

This allows us to be in adequacy with the packages that the author of these

*/py-qt5-*: Remove Digia's mention in pkg-descr

There was Trolltech, Nokia, Qt Project, Digia and today The Qt Company.
To avoid replacing the name at each structure, we will simply mention
that:
"PyQt5 is a set of Python bindings for Qt5 application framework"

graphics/mesa-libs: Bump reverse deps for libglvnd

Per discussion with bapt on helping pkg handle the changing of these
deps and avoiding impossible upgrade senarios.

PR:		246767
Reviewed by:	manu, bapt
Approved by:	x11
Differential Revision:	https://reviews.freebsd.org/D30824

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

Remove # $FreeBSD$ from Makefiles.

Remove empty PY_ENUM34 from ports using Python 3.6+

Update Qt/PySide2 to 5.15.2 / PyQt to 5.15.1 / SIP to 5.4.0
This commit combines several updates.

- Update Qt to 5.12.2
- Update PyQt to 5.15.1
- Since PySide 5.15.1 is broken with Qt 5.15.2, so PySide and Shiboken are also
updated to 5.15.2.
- Update sip to 5.4.0

SIP is a collection of tools  to create Python bindings for C and C++ libraries
and used by PyQt and wxPython. There are some changes with sip5 [1]:
- python 3.5+ is required
- sip drops support of old deprecated methods as sipdistutils & cie.
- this version breaks also PyQt5 extension ABI. SIP files will be installed in
${PYTHON_SITELIBDIR}/PyQt${_PYQT_VERSION}/bindings
- some ports will use the new pyqtbuilder package with the pyproject.toml setup.
Instead if the project have a setup.py, you should use sip-build to build it.
- if a port needs sip, it should also needs pysip. BTW, py-qt5-core requires
pysip, so that should be enough for PyQt packages.

Update PyQt to 5.15.0, py-sip to 4.19.24 and qscintilla2 to 2.11.5

- Update PyQt to 5.15.0, py-sip to 4.19.24 and qscintilla2 to 2.11.5
- Use pypi for PYQT [1]
- Add devel/py-qt5-sip (Don't use it for now. It will be used in future updates
of PyQt with py-sip >= 5)
- Add missing py-qt5 ports: comms/py-qt5-sensors, devel/py-qt5-location,
devel/py-qt5-remoteobjects, net/py-qt5-networkauth
- Strip libs
- Refactor *_PATH and *_PORT parts

[1] RiverBankComputing doesn't offer links to download latest version of some
ports

PR:		247369
Reviewed by:	tcberner
Differential Revision:	https://reviews.freebsd.org/D25749
Exp-run by:	antoine

Update py-sip to 4.19.21 and qscintilla2 to 2.11.4

  - Update py-sip to 4.19.21
  - Update qscintilla2 to 2.11.4
  - Replace MASTER_SITE_RIVERBANK with https versions
  - Replace QSCI2_DISTNAME to match with the new one

PR:		245308
Approved by:	tcberner (mentor)
Exp-run by:	antoine

Add USES=xorg USES=gl, ports categories d

Add USES=xorg, USES=gl and in a few cases USES=gnome to ports in categories
starting with 'd'.

Update PyQt5 to 5.12.1

- Upgrade sip to 4.19.15
- Upgrade qscintilla2 to 2.11.1
- Upgrade PyQt to 5.12.1

- From this version on www/py-qt5-webengine is unbundled and ships its own
distfile

PR:		236894
Exp-run by:	antoine

Fix Qt5 symbol version scripts to put the catch-all clause first.  When
a symbol matches multiple clauses the last one takes precedence.  If the
catch-all is last it captures everything.  In the case of Qt5 libraries
this caused all symbols to have a Qt_5 label while some should have
Qt_5_PRIVATE_API.  This only affects lld because GNU ld always gives the
catch-all lowest priority.

Older versions of Qt5Webengine exported some memory allocation symbols from
the bundled Chromium.  Version 5.9 stopped exporting these [1] but the
symbols were kept as weak wrappers for the standard allocation functions to
maintain binary compatibility. [2][3]  The problem is that the call to the
standard function in these weak wrappers is only resolved to the standard
function if there's a call to this standard function in other parts of
Qt5Webengine, because only then is there a non-weak symbol that takes
precedence over the weak one.  If there's no such non-weak symbol the call

Update PyQt5 to 5.11.3

- sip         upgrade to 4.19.13
- qscintilla2 upgrade to 2.10.8
- PyQt5       upgrade to 5.11.3

This has been worked on by arrowd and myself.

PR:		233954
Exp-run by:	antoine

pyqt: Change install directories for Python flavor support

* PyQt could not be installed for multiple Python versions at
  the same time, as there were conflicting files.

  This patch creates Python-version versioned directories for
  all these, and further installs binaries with a version number.

* Note, there might be some hickups for software that depends on
  on of the .so's provided by PyQt5, which might not be found
  anymore autmotically, and maybe need some LD-flaggery.

* Update PyQt5 to 5.10.1

* Mark www/py-qt5-webengine broken. It is unforuntately no longer
  compatible with the old qt5-webengine-5.9.4 we ship.

PR:		232745
Exp-run by:	antoine
Differential Revision:	https://reviews.freebsd.org/D8714

Replace bsd.qt.mk by Uses/qt.mk and Uses/qt-dist.mk

From now on, ports that depend on Qt4 will have to set
	USES=		qt:4
	USE_QT=		foo bar
ports depending on Qt5 will use
	USES=		qt:5
	USE_QT=		foo bar

PR:		229225
Exp-run by:	antoine
Reviewed by:	mat
Approved by:	portmgr (antoine)
Differential Revision:	-https://reviews.freebsd.org/D15540

Bump PORTREVISION in the PyQt5 ports after r460809.

- Update WWWs for all py-qt4* and py-qt5* ports
- Fix plists for py-qt5* for python3 case, adding missing .pyi files

Approved by:	portmgr blanket

Update SIP to 4.19.6, PyQt4 to 4.12.1 and PyQt5 to 5.9.2.

Upstream no longer ships the contents of misc/py-qt5-doc, so the port has been
removed.

This is also a requirement for updating the Qt5 ports, as the PyQt5 version
currently in the tree has license conflicts with later Qt versions.

Big thanks to tcberner for doing most of the work here, and antoine for the
exp-run.

PR:		224739

Convert Python ports to FLAVORS.

  Ports using USE_PYTHON=distutils are now flavored.  They will
  automatically get flavors (py27, py34, py35, py36) depending on what
  versions they support.

  There is also a USE_PYTHON=flavors for ports that do not use distutils
  but need FLAVORS to be set.  A USE_PYTHON=noflavors can be set if
  using distutils but flavors are not wanted.

  A new USE_PYTHON=optsuffix that will add PYTHON_PKGNAMESUFFIX has been
  added to cope with Python ports that did not have the Python
  PKGNAMEPREFIX but are flavored.

  USES=python now also exports a PY_FLAVOR variable that contains the

Revision bump of all ports with USE_GL after consolidation of mesa-libs

Approved by:	swills (mentor)
Differential Revision:	https://reviews.freebsd.org/D10845

At very long last land PyQt5 5.5.1 ports.

Add the required bits to Uses/pyqt.mk along with all the PyQt5 ports.
Thankfully this commit is mostly adding new ports, as the hard work was
already done in r403297 and r403662.

Huge kudos to Tobias Berner <tcberner@gmail.com> and, most importantly,
Guido Falsi (madpilot@) for their initial work on these ports (see D2910 in
Phabricator for an earlier version of the PyQt5 patch set).

PR:		204672