Adds a blank config for fetching a remote admin session key

meshtastic/admin.proto

@@ -71,6 +71,11 @@ message AdminMessage {
      * TODO: REPLACE
      */
     SECURITY_CONFIG = 7;
+
+    /*
+     *
+     */
+    SESSIONKEY_CONFIG = 8;
   }
 
   /*

meshtastic/config.proto

@@ -1069,6 +1069,11 @@ message Config {
     bool admin_channel_enabled = 8;
   }
 
+  /*
+   * Blank config request, strictly for getting the session key
+   */
+  message SessionkeyConfig {}
+
   /*
    * Payload Variant
    */
@@ -1081,5 +1086,6 @@ message Config {
     LoRaConfig lora = 6;
     BluetoothConfig bluetooth = 7;
     SecurityConfig security = 8;
+    SessionkeyConfig sessionkey = 9;
   }
 }