Import dhcpcd-6.4.6 with the following changes:

  *  Detect removal of IPv6 routes
  *  Don't add link-local addresses to POINTOPOINT interfaces
  *  Don't discard expired DHCPv6 leases when dumping them
  *  If a DHCPv6 lease has no timers, expire it right away
  *  Report delegated addresses
  *  Call dhcpcd-run-hooks correctly when delegated prefixes already exist
  *  Fix a memory error when ia_* config exists but IPv6 is disabled
  *  Ensure servername and bootfile are safely exported
  *  Sanitise the following characters using svis(3) with VIS_CTYLE and
     VIS_OCTAL:
         | ^ & ; < > ( ) $ ` \ " ' <tab> <newline>
     This allows a non buggy unvis(1) to decode it 100% and stays compatible
     with how dhcpcd used to handle encoding on most platforms.
     For systems that supply svis(3) there is a code reduction, for systems
     that do not, a slight code increase. This change mitigates systems
     affected by bash CVE-2014-6271 and CVE-2014-7169.
Import dhcpcd-6.4.7 with the following change:
  *  Fix an impossible analyser error and correctly assign unset iaids.