Clarification of License Terms - Asterisk

[Nathan Sullivan]

Hey Guys,

Was just reading some stuff out of pure chance, and saw something that
sounds borderline contradictory, someone mind giving a second opinion? See
below:

http://www.asterisk.org/developers/bug-guidelines

The reason for the contributor license agreement has been discussed many
times, but the general gist is that your contribution must not introduce any
encumbrance to the Asterisk code base, but Digium DOES NOT OWN your
contribution, *and they cannot take released Asterisk out of GPL.* Relax;
it's a very fair and reasonable license, and does not remove your rights or
threaten the open source nature of the project. See the mailing list
archives for long explanations of why everyone who contributes agrees that
it's a fair and sane thing to do. You only need to sign the contributor
license agreement once; it applies to all stuff that you send in via the
issue tracker.

https://issues.asterisk.org/view_license_agreement.php

You hereby grant Digium a perpetual, worldwide, royalty-free, irrevocable,
non-exclusive, and transferable license to use, reproduce, prepare
derivative works of, publicly display, publicly perform, distribute the
Submissions, and to sublicense such rights to others. The rights granted may
be exercised in any form or format, and Digium may distribute and sublicense
to others on any licensing terms, including without limitation: (a) open
source licenses like the GNU General Public License (GPL), or the Berkeley
Science Division license (BSD); or (b) binary, proprietary, or commercial
licenses. *If Your Submission is derived from software released by Digium
under the GPL, Digium as licensor thereof waives such requirements of the
GPL as applied to that software to the limited extent necessary to allow you
to provide the Submission and the foregoing license to Digium.*
*
*
Regards,

Nathan.
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