Fix NPE when binding SSDP socket does not succeed.

This should fix https://bugs.freenetproject.org/view.php?id=6191
Fix NPE when a service provider fails to list its services

This should fix https://bugs.freenetproject.org/view.php?id=5324
Merge remote-tracking branch 'bertm/fix-5324'
Reformat codebase using Jindent tool

Convert tabs to 4 spaces, clean up white space, wrap lines to 100
characters, indent as consistently as practical
Merge remote-tracking branch 'juiceman/Jindent_for_Steve'