debian: Update to syslog-ng 3.5.5

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian: Build-Depend on libjson-c-dev | libjson0-dev

Build depend on libjson-c-dev | libjson0-dev, to be able to compile on
both jessie+ and older distributions without changes. Puts the new
dependency in front, for auto-builders.

Closes: Debian#745014
Reported-by: Ondřej Surý <ondrej@debian.org>
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian: Switch the libdbi0-dev | libdbi-dev build-dep order

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian: Add /var/log/error to the logrotate config

Closes: Debian#747020
Reported-by: Facundo Aguirre <facundo@creativadigital.com.ar>
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian: Include syslog-ng-test in syslog-ng-dev

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
debian: Add an upstart init job

Requested-by: Sebastien Badia <sebastien.badia@enovance.com>
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>