Revision r8677
sw/src/network.*: Sync the player's MouseAimingOn field. This is required for the slope tilting check in player.cpp:PlayerAutoLook, introduced in JFBuild commit 1915f408962b4d9c814f64affda634d28582e25e and updated in commit ef9aea53aced8fd90c701d0c8a9a927a23dd0a40.