Introduce versions of the Mozilla Public License (MPL)

[dbaio]

Summary

Introduce versions of the Mozilla Public License (MPL)

MPL10 - https://opensource.org/licenses/MPL-1.0
MPL11 - https://opensource.org/licenses/MPL-1.1
MPL20 - https://opensource.org/licenses/MPL-2.0

More info about the Mozilla Public License:
https://www.mozilla.org/en-US/MPL/

Reviewed by:	???
Approved by:	???
Differential Revision:	https://reviews.freebsd.org/D11696

Test Plan

There are ~130 ports using the MPL license. The idea is to change all of them to the corresponding version.

Some examples:

MPL10 --> lang/nqc
MPL11 --> devel/itext
MPL20 --> devel/bugzilla44,devel/bugzilla50

After that, remove MPL license without version from Mk/bsd.licenses.db.mk file.

[AMDmi3]

LGTM. However, I'd also introduce a mechanism which generates DEV_WARNING when MPL is used, in a similar way it's done for BSD license:

https://svnweb.freebsd.org/ports/head/Mk/bsd.sanity.mk?revision=444324&view=markup#l112

[dbaio]

Thank's @AMDmi3

Including dev_warning as suggested.

[AMDmi3]

Great!

[mat]

Mk/bsd.licenses.db.mk

45–46 ↗

(On Diff #31128)

No real need to move RUBY here.

[dbaio]

Just remove the MPL license from _LICENSE_LIST (@mat request)

[mat]

(Note that phabricator is somewhat lying, you do not need portmgr's approval for the b.license.db.m change, though you need it for b.sanity.m)