Log Message:
Import dhcpcd-8.1.0 with the following changes:
 * DragonFlyBSD: Improved rc.d handling
 * Fix carrier status after a route socket overflow
 * Allow domain spaced options
 * DHCP: Allow not sending Force Renew Nonce or Reconf Accept
 * IPv4LL: Now passes Apple Bonjour test versions 1.4 and 1.5
 * ARP: Fix a typo and remove pragma (thus working with old gcc)
 * DHCP6: Fix a cosmetic issue with infinite leases
 * DHCP6: SLA 0 and Prefix Len 0 will now add a delegatd /64 address
 * Ignore some virtual interfaces such as Tap and Bridge by default
 * BPF: Move validation logic out of BPF and back into dhcpcd