When I shut down a machine with jessie, the dhcp server gets a release request.
But then it refuses to release the lease and logs an error that the IP address
answers a ping after sending a release request.  This is GNU/kFreeBSD
10.0-1-amd64 #0 Tue, 20 May 2014 12:47:21 +0100 x86_64 amd64 Intel(R) Core(TM)
i7-2635QM CPU @ 2.00GHz GNU/kFreeBSD running Debian GNU/kFreeBSD testing
(jessie).  This happens every shutdown or reboot.  The machine probably should
not respond to a ping (for whatever reasons) after sending a release request to
the dhcp server.

Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)