Remove expired ports:

2020-03-01 audio/idjc: Old, uses EOLed python27
2020-03-01 cad/py-pycam: Old, uses EOLed python27
2020-02-27 chinese/gimp-help-zh_CN: Broken
2020-03-01 databases/emma: Old, uses EOLed python27
2020-03-01 deskutils/anamnesis: Old, uses EOLed python27
2020-02-28 deskutils/cherrytree: Old, uses EOLed python27
2020-03-01 deskutils/gbirthday: Old, uses EOLed python27
2020-03-01 deskutils/gtg: Old, uses EOLed python27
2020-03-01 deskutils/nemo-extensions: Old, uses EOLed python27
2020-03-01 deskutils/pybookreader: Old, uses EOLed python27
2020-03-01 devel/diffuse: Old, uses EOLed python27
2020-02-28 devel/dreampie: Old, uses EOLed python27
2020-03-01 devel/gtkparasite: Old, uses EOLed python27

Clean up USES

With hat:	portmgr

Deprecate some pygtk2 ports

With hat:	portmgr

Bump PORTREVISION for ports depending on the canonical version of GCC
as defined in Mk/bsd.default-versions.mk which has moved from GCC 8.3
to GCC 9.1 under most circumstances now after revision 507371.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, everything INDEX-11 shows with a dependency on lang/gcc9 now.

PR:		238330

Bump PORTREVISION for ports depending on the canonical version of GCC
defined via Mk/bsd.default-versions.mk which has moved from GCC 7.4 t
GCC 8.2 under most circumstances.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, as a double check, everything INDEX-11 showed depending on lang/gcc7.

PR:		231590

Use PY_FLAVOR for dependencies.

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

Sponsored by:	Absolight

Bump PORTREVISIONs of all users of math/mpc that we just updated to
version 1.1.0 (via revision 464079).

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

graphics/py-opengl{-accelerate}: 3.0.1 -> 3.1.0, change to PyPI naming

- upgrade fixes the use of the port
- py-opengl -> py-PyOpenGL
- py-opengl-accelerate -> py-PyOpenGL-accelerate

PR:		205472
Submitted by:	matthew@reztek.cz
Reviewed by:	koobs

Remove ${PORTSDIR}/ from dependencies, Mk and categories a, b, and c.

With hat:	portmgr
Sponsored by:	Absolight

Remove empty pkg-plist.

Sponsored by:	The FreeBSD Foundation

Rename cad/pycam to cad/py-pycam, to match Python naming rules.

Reviewed by:	koobs@
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D5168