[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)

[SomaZ]

So, what's missing, or what do you plan to add? What's the current state of this?

[Razish]

This is ready to go. Oops, didn't realise I still had the big scary label still applied.

I have two follow-up branches locally that build on top of this

[taysta]

Have been running this in TaystJK for quite some time, we had issues until we got the gamestate earlier as already applied to this PR. Have not had any issues since.