reworked input timing a bit more, now cl_movement 1 mode syncs client packets to...

reworked input timing a bit more, now cl_movement 1 mode syncs client packets to the incoming server packets (because the server does not trust the client's timing, only the history of server frames sent to the client, and thus the client has to sync exactly to the server timing to work)
moved CL_SendCmd() call into CL_ReadFromServer right after CL_ReadDemoMessage(), this fixes the prediction jitters that recently appeared with the cl_netinputpacketspersecond feature, however it might add a slight delay in local games (I haven't noticed a delay however)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5990 d7cf8633-e32d-0410-b094-e92efae38249