Lots of different fixes, client-side mainly.

  - Clnt: T1=T2=0 is now handled properly (bug #145)
  - Clnt: REQUEST now contains addresses offered in ADVERTISE (bug #152)
  - Clnt: Received advertise(s) + preference are now printed (sorted).
  - Clnt: No longer gets confused if there is no reply to REQUEST message (bug #147)
  - Clnt: Chooses server properly when there are more then one server (bug #151)
  - Clnt: Prefixes are split properly when forwarding is enabled
  - Clnt: /etc/resolv.conf update improved
  - Clnt/Srv: Time is now used properly during DUID-LLT creation (bug #149)
  - Srv: Does not complain anymore, when receives message addressed to a different server (bug #157)
  - Srv: No longer crashes when is unable to find relay (bug #144)
  - Relay: Global peer-addr field was not set properly in RELAY-FORw (bug #143)

All of the above (except one) are result of a great interop test session in Amsterdam.