Log Message:
Import dhcpcd-6.5.1 with the following changes:

  *  Use RTF_PINNED when deleting routes when available
     Allows dhcpcd to control IPv4 routing on newer FreeBSDs
  *  Don't work on bridge, or ptp interfaces unless explicitly told
  *  Poll for IFF_RUNNING again but avoid constantly sending IFF_UP
     (should now fix all carrier problems on BSD virtual interfaces)
  *  Don't crash when processing IPv6 route calls from the kernel
     when IPv6 resources have been disabled in dhcpcd
  *  Allow the same IP address to be shared across different interfaces
     Interface with the lowest metric gets the IP address, will move
     to the next highest if dropped (interface departs, carrier drops, etc)
  *  Use correct interface gateway on FreeBSD, removes need for linkaddr.c
     on kFreeBSD
  *  Delegated prefix addresses are now reported via DELEGATE6
  *  Fix copying the correct timezone file
  *  Work better with unknown delegated prefix lengths
  *  Move IPv4LL and ARP to the DHCP eloop queue to fix timing issues
  *  Add IA PD documentation update from christos@netbsd.org