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  leak ~20-30 octets per DHCPDISCOVER packet while failover was in use
  and in normal state. [ISC-Bugs #19548]

- Various compilation fixes have been included for the memory related
  DEBUG #defines in includes/site.h.  [ISC-Bugs #19548]

(reported via contact form from Aleksander mealstrom@ukr.net.)
Bug: #19536

  a DHCID (still currently implemented as a TXT RR).  This would cause later
  expiration or release events to fail to remove the domain name.  The feature
  now also inserts the client's up to date DHCID record, so records may safely
  be removed at expiration or release time.  Thanks to a patch submitted by
  Christof Chen.  [ISC-Bugs #19500]

  to stop receiving packets is fixed.  The same fix also means that the MAC
  address will no longer appear 'bogus' on DLPI-based systems.
  [ISC-Bugs #19186]

- A bug in select handling was discovered where the results of one select()
  call were discarded, causing the server to process the next select() call
  and use more system calls than required.  This has been repaired - the
  sockets will be handled after the first return from select(), resulting in
  fewer system calls.  [ISC-Bugs #19186]

  rather than using a broadcast address.  Thanks to a patch from David
  Cantrell at Red Hat. [ISC-Bugs #17740]

attribution rather than 'RedHat'.

  result in an erroneous error log message ('garbage in format string').
  [ISC-Bugs #19327]

  described in the -12 revision of the Failover draft (and assigned by
  IANA).  [ISC-Bugs #17738]

  the client has been deprived of all A and AAAA records (not only the last
  one of either of those).  This resolves a bug where dual stack clients
  would not be able to regain their names after either expiration event.
  [ISC-Bugs #18716]

Add dummy initializers to a few local variables to fix build errors on v4-only builds with older versions of gcc. [rt19321]

  free not on its queue' error messages, thanks to a patch from Frode
  Nordahl. [ISC-Bugs #19274]

  and Request packets, if the dynamic range covering any requested addresses
  had been deleted from configuration.  [ISC-Bugs #19134]

  which is seen in some malformed DHCP client packets, was modified.
  It now logs the universe name, and does not log the length values
  (which are bogus corruption read from the packet anyway).  It also
  carries a hopefully more useful explanation. [ISC-Bugs #18241]