Log Message:
Update to dhcpcd-6.9.2 with the following changes:
  *  Only run the IPv4LL script and rebuild routes on drop when
     an address is actually dropped.
  *  Add noup directive to stop master mode bringing an interface up.
  *  Fix compile for old Linux systems.
  *  If only IPv4LL addresses exist, assign a default route to the
     interface so that IPv4LL can talk to non IPv4LL on the same link.
  *  Set DHCPv4 MTU on routes instead of the interface.
     This matches IPv6 behaviour and works around dodgy interfaces
     where a MTU change can reset the PHY causing an infinite loop.
  *  MTU is now requsted by default in dhcpcd.conf again.
  *  noauthrequired also allows unauthenticated FORCERENEW and
     RECONFIGURE messages.
  *  Simplify the socket code by adding a custom function instead of
     having the same #ifdef mess for systems without SOCK_CLOEXEC.
     Thanks to Christos Zoulas.
  *  Don't do platform init or setting interface MTU if too small when
     testing or dumping leases.
  *  Build new_domain_name from other sources if blank before checking
     it's blank to remove any prior config. Thanks to Paul Walrath.
  *  Describe adding an IPv6 temporary address.
  *  Don't delete dhcpcd assigned IPv6 link-local addresses when
     releasing leases.
  *  Reference old DHCPv6 FQDN when processing the hostname.