* libinet6/resolv/res_{init,send}.c: be more backward-compatible with   past behavior.  some userland code may not initialize   nsaddr_list.sa_len.
* libinet6/resolv/res_{init,send}.c: be more backward-compatible with
  past behavior.  some userland code may not initialize
  nsaddr_list.sa_len.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame