Implements panic bunkering. (#9315)

* Implements panic bunkering.
Helps with raid management, esp with unknown accounts.

* adds an enable/disable command.

Content.Shared/CCVar/CCVars.cs

@@ -207,6 +207,18 @@ namespace Content.Shared.CCVar
         public static readonly CVarDef<int> SoftMaxPlayers =
             CVarDef.Create("game.soft_max_players", 30, CVar.SERVERONLY | CVar.ARCHIVE);
 
+        /// <summary>
+        /// Whether or not panic bunker is currently enabled.
+        /// </summary>
+        public static readonly CVarDef<bool> PanicBunkerEnabled =
+            CVarDef.Create("game.panic_bunker.enabled", false, CVar.SERVERONLY);
+
+        /// <summary>
+        /// Minimum age of the account (from server's PoV, so from first-seen date) in minutes.
+        /// </summary>
+        public static readonly CVarDef<int> PanicBunkerMinAccountAge =
+            CVarDef.Create("game.panic_bunker.min_account_age", 1440, CVar.SERVERONLY);
+
 #if EXCEPTION_TOLERANCE
         /// <summary>
         ///     Amount of times round start must fail before the server is shut down.