* fix(msg): correct comments regarding default values
The mentioned defaulting happens in
FwLateralLongitudinalControl::updateLongitudinalControlConfiguration,
where they clearly default to the climb / sink rate _setpoint_, not the
respective maximum.
No new message version needed as only comment is changed.
* fix(msg): correct stale publisher reference in FixedWingLateralGuidanceStatus
fw_pos_control was split into fw_mode_manager and
fw_lateral_longitudinal_control; the topic is published by
the mode manager.
