[$] Distinguishing Debian testing from unstable

Sometimes, the smallest changes create the longest discussions. As a casein point, a proposal to make a one-line change in an informational textfile on systems running the Debian unstable distribution has blown up intoan interminable and sometimes unfriendly debate. At its core, though, thisdiscussion comes down to a seemingly simple question: should a program beable to determine whether it is running on a Debian testing or unstablesystem?