* netbsd/sys/net/route.c: do not fill rmx_mtu too much on RTM_ADD/   RTM_RESOLVE.  this was merged by mistake during past kame work.
* netbsd/sys/net/route.c: do not fill rmx_mtu too much on RTM_ADD/
  RTM_RESOLVE.  this was merged by mistake during past kame work.

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