Fix epoll dispatch dropping INotify events, ConsoleServer self-deadlock, and add TLS SNI support

- INotify/Thread epoll dispatch was silently dropping every live
  core::INotify event (an isKnownINotify registry fixes it) - this had
  broken mail delivery for over a week, masked by routine restarts.
- TCPServer::lock self-deadlocked every admin-console connection via a
  plain std::mutex being re-entered; switched to recursive_mutex.
- TLS.cpp/h: SNI-based certificate selection (addSNIContext), the
  groundwork for multi-tenant TLS (qualityiron.vegas alongside
  barant.com on one APIServer process).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

ConsoleServer.cpp

@@ -16,7 +16,7 @@ namespace core {
       // TCPServer::sessions became shared_ptr-owned - see its own doc
       // comment) despite connectionRequest()/removeFromSessionList()
       // both mutating this same vector under `lock` from other threads.
-      std::lock_guard<std::mutex> guard(lock);
+      std::lock_guard guard(lock);
       for(auto &session : sessions)
         ((ConsoleSession *)session.get())->writeLog(out);
    }