FS-6204 refactor some dtls code to generate a 1024 bit cert suitable for dtls in all version of chrome

./debian/util.sh build-all will do a number of builds in sequence or
parallel.  We now track if any of those builds fail to return a
.changes file and exit non-zero.

Speex is in the core, so Tony dropped the module.

Removed non existing header file from libspeex Visual Studio 2012 project. This makes Visual Studio understand that the lib is built correctly.

FS-6230 --resolve There was no NAT detection enabled on the calls, this patch will activate it explicitly when used with force-rport to avoid a similar problem with other users

regression from 8f82979d using wrong values to calculate buffer size