Fix SD_NR_EVENTS.
apply Debian specific settings

There is no libfastlz-dev in Debian.org, do not Build-Depend on it.
However, it is available at bareos.org and there it will be used
(installed via platforms/packaging/bareos.dsc).
Set source format to 3.0 quilt.
Set Vcs-* headers to the proper GitHub repository and branch,
using these, tracker.debian.org will show proper links to the repository
and tools like debcheckout will be able to fetch the source from git.

Signed-off-by: Marco van Wieringen <marco.van.wieringen@bareos.com>