Re-apply part of r559792 (INDEX and bulk -a OK)

With hat:	portmgr

Revert r559792 to unbreak INDEX and bulk -a
It seems a lot of reverse dependencies were missed

With hat:	portmgr

Remove most expired ports that depend on Python 2.7:

Exceptions are:
- mail/mailman, our listservers still use it
- www/chromium, solely because of popular demand,
  upstream is (slowly) working on porting it to Python 3
- ports that have actual patches for Python 3 against
  them (Cinnamon and a few unrelated other ports)
- llvm70 and qt5-webengine because they seem to have a lot
  of dependencies which need further analysis
- sysutils/uefi-edk2-bhyve because bhyve seems to use them
- python2 and python27 themselves

I'm sure there will be complaints, but the nice thing about
a version control system is that we can revert and adjust things.

Clean up USES

With hat:	portmgr

Take Maintainership

Sponsored by:	Netzkommune GmbH

Return some ports to the pool.  I no longer use trac or MySQL.

Use PY_FLAVOR for dependencies.

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

Sponsored by:	Absolight

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

www/trac-*: minor cleanup

- Don't use trac/plugin.mk which is now empty and unneeded
- Add some NO_ARCH'es
- Add/fix some LICENSEs and LICENSE_FILES
- Pet portlint
- Regenerate some patches

Approved by:	portmgr blanket

Remove ${PORTSDIR}/ from dependencies, categories v, w, x, y, and z.

With hat:	portmgr
Sponsored by:	Absolight

This plugin is a password store for the AccountManagerPlugin that
provides authentication and group membership from an LDAP
service. Users are authenticated by performing an LDAP bind against a
directory using their credentials. The plugin will also pull the email
address and username from the directory and populate the
session_attribute table.

WWW: https://trac-hacks.org/wiki/LdapAuthStorePlugin

Reviewed by:		koobs
Differential Revision:	https://reviews.freebsd.org/D4796