Core/WorldSession: Add RBAC permission for skipping idle connection check (#20595)

(cherry picked from commit 558382ed6d)

src/server/game/Accounts/RBAC.h

@@ -57,7 +57,7 @@ enum RBACPermissions
     RBAC_PERM_JOIN_RANDOM_BG                                 = 4,
     RBAC_PERM_JOIN_ARENAS                                    = 5,
     RBAC_PERM_JOIN_DUNGEON_FINDER                            = 6,
-    //  7 - reuse
+    RBAC_PERM_IGNORE_IDLE_CONNECTION                         = 7,
     //  8 - reuse
     //  9 - reuse
     RBAC_PERM_USE_CHARACTER_TEMPLATES                        = 10,

src/server/game/Server/WorldSession.cpp

@@ -329,7 +329,7 @@ bool WorldSession::Update(uint32 diff, PacketFilter& updater)
     ///- Before we process anything:
     /// If necessary, kick the player because the client didn't send anything for too long
     /// (or they've been idling in character select)
-    if (IsConnectionIdle())
+    if (IsConnectionIdle() && !HasPermission(rbac::RBAC_PERM_IGNORE_IDLE_CONNECTION))
         m_Socket[CONNECTION_TYPE_REALM]->CloseSocket();
 
     ///- Retrieve packets from the receive queue and call the appropriate handlers