(Docs) Add Debian/Ubuntu-appropriate package name to RRD report info
(Docs) Point out that setting "user" in an exec does not automatically set $HOME

Users were sometimes expecting this to happen, so we should point out that it
doesn't.
Merge pull request #1786 from nfagerlund/debian_rrd

(Docs) Minor documentation updates
Merge branch 'stable'

* stable:
  (Docs) Point out that setting "user" in an exec does not automatically set $HOME
  (Docs) Add Debian/Ubuntu-appropriate package name to RRD report info