Log Message:
Import dhcpcd-7.0.0-rc2 with the following changes:

  *  dhcp: fixed classless static routes
  *  prefix delegation: build routes after assigning addresses
  *  dhcp: on lease expiration, discover only when carrier
  *  ip6: fix potential segfault when lifetime overflows
  *  bsd: compile on recent OpenBSD platforms
  *  dhcp: fix reporting of DNS encoded SIP servers
  *  dhcp6: fix unicast in non master mode