* Merge from debian unstable. Remaining changes: - Set /var/lib/tftpboot by default instead of /srv/tftp. - Decrease priority of tftp path from high to low. - debian/rules, debain/tftpd-hpa.upstart: Convert to usptart (LP: #522509) - debian/patches/04-use-memcpy-for-header.patch: fix FORTIFY-detected potential memory corruption (LP: #6913