Log Message:
Import dhcpcd-6.11.1 with the following changes:
  *  Fix truncated packet handling where the DHCP message is less than the
      BOOTP size
  *  Rework the raw socket handling around an fd for initial Solaris support
  *  Only pull one message from the raw socket - eloop will handle the looping
  *  Netmask fixes for STATIC and INFORM
  *  Rework if_address to use struct ipv4_addr, like the ipv6 counter parts
  *  Split BSD handlink into many smaller functions to improve readability
  *  empty DNS entries are no longer created
  *  Test for hostname_fqdn being set to server or blank
  *  Allow an SLA 0 and prefix length of 0 to delegate the whole prefix
     ia_pd 1 wm1/0
  *  Fix prefix delegation address timings on renew