tracking: implement PING and PONG packets
tracking: implement PING and PONG packets

RBE-Avionik/skylines,Turbo87/skylines,dkm/skylines,skylines-project/skylines,dkm/skylines,Harry-R/skylines,skylines-project/skylines,Harry-R/skylines,TobiasLohner/SkyLines,dkm/skylines,kerel-fs/skylines,dkm/skylines,skylines-project/skylines,Harry-R/skylines,skylines-project/skylines,snip/skylines,Turbo87/skylines,snip/skylines,RBE-Avionik/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,Harry-R/skylines,shadowoneau/skylines,snip/skylines,Turbo87/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,shadowoneau/skylines,kerel-fs/skylines,shadowoneau/skylines,kerel-fs/skylines,Turbo87/skylines