rtpproxy: fix rtpproxy_engage() pvar expansion

Reported by Ovidiu Sas
Closes #195
msilo dbschema: avoid setting a default value for the body field

	* this causes errors/warnings on backends such as MySQL/MariaDB
(cherry picked from commit 5c790aa9431401dc0b906a9a8694dffb6bd1d34b)
remove id from version output, since it is no longer used

(cherry picked from commit 1f68d9aade9b0eb2ce15d11a82431e3ff53b12ee)
Makefile: add git revision in the tarballs

(cherry picked from commit 8ad936f44b5bb5fbe3cbac4ce015ae7bafaf21fb)
generate .gitrevision file if it does not exist

(cherry picked from commit eb06db1a12ee39cc251f3ff7d7fe6918a6c5898c)
acc: make sure we we don't write the same record twice

this scenario appears when using multi bye leg support and there are no legs

(cherry picked from commit 48050eeab8e6c2c496e5a746e07a1092a6a523e0)
RPM spec: fixed x64_86 compilation problems, added some dependencies
RPM spec: corrected changelog section format
regenerate the TLS CA and default certificate

	* the CA passphrase did not match the one in the README
(cherry picked from commit 3a0bca84986d81a8d64037d082b86ae13b5a50f0)
TLS README: correct spelling and grammar
(cherry picked from commit 4f7df942a34162619a9c3b7b6d2d25f7ac8aee2f)