Support null values for JsonArray

Signed-off-by: nscavell <nick.scavelli@gmail.com>
Make sure previous auth is cancelled when new auth is put
Merge pull request #805 from nscavell/jsonarry-null

Support null values for JsonArray
Fix NPE in JsonArray.equals when array contains nulls

Signed-off-by: Sergey Zaytsev <sergey@zaytseff.net>
Merge pull request #807 from zaytsev/jsonarray-npe-signed

Fix NPE in JsonArray.equals when array contains nulls
Make sure the Buffer of the bodyHandler can be GC'ed