Avoid lags using movevar.

dlls/player.cpp

@@ -2815,6 +2815,7 @@ void CBasePlayer::Spawn( void )
 
 	g_engfuncs.pfnSetPhysicsKeyValue( edict(), "slj", "0" );
 	g_engfuncs.pfnSetPhysicsKeyValue( edict(), "hl", "1" );
+	g_engfuncs.pfnSetPhysicsKeyValue( edict(), "fr", "1" );
 
 	pev->fov = m_iFOV = 0;// init field of view.
 	m_iClientFOV = -1; // make sure fov reset is sent

pm_shared/pm_shared.c

@@ -3319,7 +3319,8 @@ void PM_Move( struct playermove_s *ppmove, int server )
 	}
 
 	// Reset friction after each movement to FrictionModifier Triggers work still.
-	if( pmove->movetype == MOVETYPE_WALK )
+	// Use movevar to avoid lags with different clients and servers.
+	if( !( pmove->multiplayer && atoi( pmove->PM_Info_ValueForKey( pmove->physinfo, "fr" )) == 0 ) && pmove->movetype == MOVETYPE_WALK )
 	{
 		pmove->friction = 1.0f;
 	}