* Fixed a bug of the backpass detection. Two or more players from
different teams kick the ball in the same game cycle, the back
passer candidates are erased.
* Fixed an issue with the CatchRef which did not allow a goalie to
catch the ball, after having intercepted it from an opponent,
dribbled to its own area and catch it. Regardless of the
interception position, this should never lead to a foul being
called. Thanks go to Fernando Almeida for reporting the problem
and providing the patch.
* Changed the defalut value of server::log_date_format from
"%Y%m%d%H%M-" to "%Y%m%d%H%M%S-".
* Fixed a defect of boost detection.