* add a pid file option on command line + implement it
* make the relative path in conf param relative to the configuration
file directory and not the running directory
* the chdir was done after the loading of the conf file, reversing it
* in case log_level is not set, the application would segfault, now
handled properly (default is info)
* remove logging to the daemon facility
as many configuration paths can be relative to the execution working
directory, this directory is recorded at launch time, and the set_params
function does a chdir(<start work dir>); <load conf>; chdir("/") when
it's called.
* split the rfc3161 and the http part
* add a logger function
* add a debugging logger function for the requests
* add a specific handler for rfc3161 request