LibCore: Expose Unix socket fd transfer limit publicly

Author: https://github.com/ADKaster
Commit: 087cbf2b0a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4848
Reviewed-by: https://github.com/kalenikaliaksandr ✅

Libraries/LibCore/Socket.h

@@ -352,6 +352,8 @@ public:
 
     virtual ~LocalSocket() { close(); }
 
+    static size_t const MAX_TRANSFER_FDS;
+
 private:
     explicit LocalSocket(PreventSIGPIPE prevent_sigpipe = PreventSIGPIPE::Yes)
         : Socket(prevent_sigpipe)