SPDX released version 3 of their license list (<https://spdx.org/licenses/>),
which changed the FSF licenses to explicitly end in -only or -or-later
instead of relying on an easy to miss + symbol.
Bug: T183858
Change-Id: Iccd10bb2facec3698afb9d67cd533762a2e53275
* Old i18n shim removed
* extension.json added
* PHP code moved into the new Description2 class
* Old PHP entry point still exists for b/c with older installations, but MW 1.25 or newer is now required
Change-Id: I0670c203b62dcf500ded1b82957e473edf864fb1
