Corrected Electric Shocker versus MVP (#3660)

* Fixes #3649.
* Electric Shocker is able to stop MVP as well.
* Status should not stack with itself.
* Status should be cleared by normal means.
Thanks to @admkakaroto!

src/map/skill.cpp

@@ -13908,8 +13908,6 @@ int skill_unit_onplace_timer(struct skill_unit *unit, struct block_list *bl, uns
 
 		case UNT_ELECTRICSHOCKER:
 			if( bl->id != ss->id ) {
-				if( status_bl_has_mode(bl,MD_STATUS_IMMUNE) )
-					break;
 				if( status_change_start(ss, bl,type,10000,sg->skill_lv,sg->group_id,0,0,skill_get_time2(sg->skill_id, sg->skill_lv), SCSTART_NORATEDEF) ) {
 					map_moveblock(bl, unit->bl.x, unit->bl.y, tick);
 					clif_fixpos(bl);

src/map/status.cpp

@@ -8996,7 +8996,6 @@ int status_change_start(struct block_list* src, struct block_list* bl,enum sc_ty
 			case SC__UNLUCKY:
 			case SC__WEAKNESS:
 			case SC_BITE:
-			case SC_ELECTRICSHOCKER:
 			case SC_MAGNETICFIELD:
 			case SC_NETHERWORLD:
 			case SC_CRESCENTELBOW:
@@ -9394,6 +9393,7 @@ int status_change_start(struct block_list* src, struct block_list* bl,enum sc_ty
 			case SC_OBLIVIONCURSE:
 			case SC_LEECHESEND:
 			case SC_CURSEDCIRCLE_TARGET:
+			case SC_ELECTRICSHOCKER:
 			case SC_BANDING_DEFENCE:
 			case SC__ENERVATION:
 			case SC__GROOMY:
@@ -13907,7 +13907,6 @@ void status_change_clear_buffs(struct block_list* bl, uint8 type)
 			case SC_EXPBOOST:
 			case SC_JEXPBOOST:
 			case SC_ITEMBOOST:
-			case SC_ELECTRICSHOCKER:
 			case SC__MANHOLE:
 			case SC_GIANTGROWTH:
 			case SC_MILLENNIUMSHIELD: