Refactor server code to use vectors instead of maps.

* Use critical sections to access characteristic/descriptor value data.

* Remove unnecessary code

* Create characteristic semaphore only if needed for indications.

* Fix advertising when not broadcasting a service.

src/NimBLEAdvertising.h

@@ -103,7 +103,7 @@ private:
     bool                 m_customAdvData = false;  // Are we using custom advertising data?
     bool                 m_customScanResponseData = false;  // Are we using custom scan response data?
     bool                 m_scanResp = true;
-    bool                 m_advSvcsSet = false;
+    bool                 m_advDataSet = false;
 
 };