libs: update to Netty 3.6

This is used by the latest release of xrootd4j.

Target: trunk
Require-notes: no
Require-book: no
Acked-by: Paul Millar
Patch: http://rb.dcache.org/r/5453

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
pool: Utilitize chunked response infrastructure in xrootd4j

I recently moved the chunked response handling into xrootd4j.
We thus no longer need it in dCache.

Target: trunk
Require-notes: no
Require-book: no
Acked-by: Tigran Mkrtchyan
Patch: http://rb.dcache.org/r/5454

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>