Backport cacti v2
Backport cacti from trusty, because the one from precise doesn't follow the GFSD
Closes http://trisquel.info/en/issues/10536
Fixed since last try:
- Copyright year
- Version number
- Removed signkey
Backport cacti from trusty, because the one from precise doesn't follow the GFSD
Closes http://trisquel.info/en/issues/10536
Fixed since last try: