@brief This is the prototype of the internal log function that it is used,
if the library client doesn't desire to override with something else.
@ingroup ancillary
@param level level of the message, as defined at syslog.h
@param fmt format string (same as format string on sprintf)
@brief This is the prototype of the internal log function that it is used, if the library client doesn't desire to override with something else. @ingroup ancillary
@param level level of the message, as defined at syslog.h @param fmt format string (same as format string on sprintf)