This removes one unnecessary exception in the PulseAudio licensing
terms. In December 2016 I asked permission from all qpaeq contributors
for the license change, and all gave the permission. I have archived the
emails here:
https://www.freedesktop.org/software/pulseaudio/misc/qpaeq_relicensing_emails.txt

The chrome OS audio server has some already existing code, which
has been made available under a BSD-style license, which should be
safe to import by us.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>

module-bluetooth-proximity has not worked for quite a while, since it
uses pre-BlueZ4 APIs. Nobody complained since then, which is a good
indication that it doesn't have much users. Even the original commit
message refers to it more as a toy than as something of great use: "add
new fun module that automatically mutes your audio devices when you
leave with your bluetooth phone, and unmutes when you come back"

Removing it we completely remove the dependency on libbluetooth.

Mention gdbm, lirc and fftw there.

Some of the license wording was less than clear. Try to clarify the
different GPL 'downgrade' scenarios but also be generic to ensure that
those packagers where GPL is a problem check thoroughly before they ship.

Inspired by comments from Brian Cameron @ Oracle via fdo#41822

This adds Andre Adrian's AEC implementation from his intercom project
(http://andreadrian.de/intercom/) as an alternative to the speex echo
cancellation routines. Since the implementation was in C++ and not in
the form of a library, I have converted the code to C and made a local
copy of the implementation.

The implementation actually works on floating point data, so we can
tweak it to work with both integer and floating point samples (currently
we just use S16LE).

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1035 fefdeb5f-60dc-0310-8127-8f9354f1896f

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@767 fefdeb5f-60dc-0310-8127-8f9354f1896f

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@765 fefdeb5f-60dc-0310-8127-8f9354f1896f

* add GPL text
* update LGPL text in regards to FSF addresses


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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@284 fefdeb5f-60dc-0310-8127-8f9354f1896f

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@157 fefdeb5f-60dc-0310-8127-8f9354f1896f

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@86 fefdeb5f-60dc-0310-8127-8f9354f1896f