Import dhcpcd-9.0.0 with the following changes:

Import dhcpcd-9.0.0 with the following changes:

 * inet: Allow forcing a host route from an interface without a lease
 * dhcpcd: Don't wait for an address family to complete if not using it

 * INET6: Support a /128 prefix advertised via RA
 * BSD: More address validation from route(4) messages
 * DHCP: Fix a potential segfault on DaD failure
 * IPv4LL: Fix a potential segfault when dropping IPv4LL addresses

 * Decode interface complex interface names eth0.100:2 eth0i100:2.
   This allows us to ignore some virtual interfaces by default
 * ARP: Report L2 header address on conflict for more clarity
 * DHCP: Support jumbo frames (untested)
 * DHCP6: Clean up old lease on failure to confirm/rebind, etc
 * RA: Prefer older routers
 * INET6: Obscure prefixes are now calculated correctly

 * Privilege Separation
 * Default hostname is now a blank string
 * Leases are now dumped over the control socket - you get RA's now as well.
 * Better support for many IPv6 routers
 * RA: Deprecate stale addresses by setting pltime 0
 * DHCP6: Deprecate stale addresses by setting pltime 0