[COMBAT SURF] Surf sliding

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update
tested it with hbound on another server, it's the sv_friction command. By default sv_friction is set to 4 (on official servers), whereas invex has it on something alot less than that, feels like its set to around 2. Ideal sv_friction for surf is around 4.8, feels much cleaner when its set to that, but you can test around and change it to whatever, just not under 4 pls