fix water jumping discrepancy

reverts a change introduced in Razish/jasdk_modbase@09edabf but provide an alternative fix that better matches SP code/behaviour with as few changes as possible
this lets you jump out of the water pools in taspir2 like you can in SP
introduces g_fixWaterJump (default: 0) / LEGACYFIX_WATERJUMP

discovered by @CansecoDev

codemp/game/bg_pmove.c

@@ -190,6 +190,16 @@ float forceJumpStrength[NUM_FORCE_POWER_LEVELS] =
 	840
 };
 
+static qboolean BG_FixWaterJump(void) {
+#if defined(_GAME)
+	return !!g_fixWaterJump.integer;
+#elif defined(_CGAME)
+	const char *cs = CG_ConfigString(CS_LEGACY_FIXES);
+	const uint32_t legacyFixes = strtoul(cs, NULL, 0);
+	return !!(legacyFixes & (1 << LEGACYFIX_WATERJUMP));
+#endif
+}
+
 //rww - Get a pointer to the bgEntity by the index
 bgEntity_t *PM_BGEntForNum( int num )
 {
@@ -2775,7 +2785,7 @@ static qboolean	PM_CheckWaterJump( void ) {
 
 	spot[2] += 16;
 	cont = pm->pointcontents (spot, pm->ps->clientNum );
-	if ( cont & (CONTENTS_SOLID|CONTENTS_PLAYERCLIP|CONTENTS_BODY) ) {
+	if (cont) {
 		return qfalse;
 	}
 
@@ -2830,6 +2840,14 @@ static void PM_WaterMove( void ) {
 		PM_WaterJumpMove();
 		return;
 	}
+	else if ( BG_FixWaterJump() && pm->ps->fd.forcePowerLevel[FP_LEVITATION] > FORCE_LEVEL_0 && pm->waterlevel < 3 )
+	{
+		if ( PM_CheckJump () ) {
+			// jumped away
+			return;
+		}
+	}
+
 #if 0
 	// jump = head for surface
 	if ( pm->cmd.upmove >= 10 ) {

codemp/game/bg_public.h

@@ -160,6 +160,7 @@ typedef enum legacyFixes_e {
 	LEGACYFIX_SABERMOVEDATA = 0,
 	LEGACYFIX_WEAPONATTACKANIM,
 	LEGACYFIX_RUNWALKANIMS,
+	LEGACYFIX_WATERJUMP,
 	/*
 	m    m                        ""#      "             m                    m
 	#    #  mmm   m   m             #    mmm     mmm   mm#mm   mmm   m mm     #

codemp/game/g_cvar.c

@@ -53,6 +53,10 @@ static void CVU_FixRunWalkAnims(void) {
 	UpdateLegacyFixesConfigstring(LEGACYFIX_RUNWALKANIMS, g_fixRunWalkAnims.integer);
 }
 
+static void CVU_FixWaterJump(void) {
+	UpdateLegacyFixesConfigstring(LEGACYFIX_WATERJUMP, g_fixWaterJump.integer);
+}
+
 static void CVU_FixWeaponAttackAnim(void) {
 	BG_FixWeaponAttackAnim();
 	UpdateLegacyFixesConfigstring(LEGACYFIX_WEAPONATTACKANIM, g_fixWeaponAttackAnim.integer);

codemp/game/g_xcvar.h

@@ -95,6 +95,7 @@ XCVAR_DEF( g_filterBan,					"1",			NULL,						CVAR_ARCHIVE,									qfalse )
 XCVAR_DEF( g_fixSaberDisarmBonus,		"1",			NULL,						CVAR_ARCHIVE,									qfalse )
 XCVAR_DEF( g_fixSaberMoveData,			"1",			CVU_FixSaberMoveData,		CVAR_ARCHIVE,									qfalse )
 XCVAR_DEF( g_fixRunWalkAnims,			"1",			CVU_FixRunWalkAnims,		CVAR_ARCHIVE,									qfalse )
+XCVAR_DEF( g_fixWaterJump,				"0",			CVU_FixWaterJump,			CVAR_ARCHIVE,									qfalse )
 XCVAR_DEF( g_fixWeaponAttackAnim,		"1",			CVU_FixWeaponAttackAnim,	CVAR_ARCHIVE,									qfalse )
 XCVAR_DEF( g_forceBasedTeams,			"0",			NULL,						CVAR_SERVERINFO|CVAR_ARCHIVE|CVAR_LATCH,		qfalse )
 XCVAR_DEF( g_forceClientUpdateRate,		"250",			NULL,						CVAR_NONE,										qfalse )