Add KNXnetIP and DSR to the list of new-to-1.99 protocols.  Add the former's
author to AUTHORS.

Also mention support of nanosecond timestamps in PCAP-NG files.

Change-Id: I31666de845240a311a8332cff42120d78d2d1474
Reviewed-on: https://code.wireshark.org/review/4367
Reviewed-by: Evan Huus <eapache@gmail.com>