d/control: Bumped Standards-Version to 3.9.6, no changes.
Add systemd service configuration for galera-arbitrator.
Bump debhelper compat level to 9.
Drop symlink for defaults file, no longer required.
Add missing systemd helper to /usr/bin.
Correct path to garb defaults file, refresh existing patches.
Fixup missing LSB header in garb init script.
Fixup systemd configuration for Debian/Ubuntu
Update changelog
Merge pull request #2 from javacruft/master

Misc fixes for percona-galera-3