Merge branch 'master' of git+ssh://git.sflphone.org/var/repos/sflphone/git/sflphone into dynamic_cast

The setting itself is stored in the daemon (and persists in the config
file), but it is up to the client to use it.

[ #14363 ] Add proper dynamic detection, add 'init' capability to codecs. If there is an exported init function, then it is called at runtime to check loading