[MP] reconcile game module changes with the original source releases by diffing codemp/game

[Razish]

Main changes:

• revert saberMoveData changes to match basejka, provide a new cvar (g_fixSaberMoveData) to patch it if desired
• introduce a new configstring (26: CS_LEGACY_FIXES) to inform the client of which fixes it should also apply, e.g. saberMoveData
• ~client module obtains gamestate (including configstrings) earlier to prevent use before initialisation, which is now checked for in debug builds~ reverted due to bugs
• revert a change to saber disarm bonus calculation if g_fixSaberDisarmBonus is not enabled
• G_CanBeEnemy considers private duels once again (removed from jasdk_modbase before its git history)