Bug 567736: [RJ-Server, RJ-Servi] Revise parts of rj.server and
rj.servi, in particular the IO code

  - Add more nullable annotations
  - Make use of current APIs by Java and JCommons
  - Fix missing logging for some exceptions
  - Fix minor bugs
  - CleanUp
  - Update examples in Javadoc

Change-Id: Ifea62888bba109f1c4f5fbf464969f36dafb67fa
70 files changed