oggenc --help and man oggenc differ about managed mode for bitrate switch

hi,

oggenc --help says:
 -b, --bitrate        Choose a nominal bitrate to encode at. Attempt
                      to encode at a bitrate averaging this. Takes an
                      argument in kbps. This uses the bitrate management
                      engine, and is not recommended for most users.

while man oggenc says:
       -b n, --bitrate=n
       Sets  encoding  to  the  bitrate  closest  to n (in
       kb/s).
(nothing about the management engine)

and
          --managed
          Set bitrate management mode.

the part that -b uses the management engine by default seems to be wrong.

regards,
wernfried