[Freeswitch-dev] Changes for files within freeswitch/libs/* compared with official version

Hi developers, I'm new to FreeSWITCH and would like to know if changes on the freeswitch/libs/* files are done ? I would like to know if it makes sense to use the original sources while prepare a FreeSWITCH packages for e.g. Debian distribution where most of these libraries exists (for some with an different version). From quality point of view it could be a bad idea to do so. Greetings, Raphael