We dropped the idea of putting the burden of providing an additional option to
the casual user. Instead the help text contains the following passage:
Starting with version 0.9.3-beta-2 bs1770gain corrects a bug dating back to the
very beginning. It now issues the correct values for the relative
* momentary mean
* momentary maximum
* shortterm mean
* shortterm maximum
loudness. If you insist on the errornous traditional approach run with long
option --traditional.