HAFAS(3pm): document similar_stops_p

=item my $status_p = Travel::Status::DE::HAFAS->new_p(I<%opt>)

Return a promise that resolves into a Travel::Status::DE::HAFAS instance

Returns a promise that resolves into a Travel::Status::DE::HAFAS instance

($status) on success and rejects with an error message on failure. If the

failure occured after receiving a response from the HAFAS backend, the rejected

promise contains a Travel::Status::DE::HAFAS instance as a second argument.

This instance can be used e.g. to call similar_stops in case of an ambiguous

This instance can be used e.g. to call similar_stops_p in case of an ambiguous

location specifier. In addition to the arguments of B<new>, the following

mandatory arguments must be set.

See Travel::Status::DE::HAFAS::StopFinder(3pm)'s B<results> method for details

on the return value.

=item $status->similar_stops_p(I<%opt>)

Returns a promise resolving to a list of hashrefs describing stops whose name

is similar to the one requested in the constructor's B<station> parameter.

Returns nothing if the active service does not support this feature.  This is

most useful if B<errcode> returns 'LOCATION', which means that the HAFAS

backend could not identify the stop.

See Travel::Status::DE::HAFAS::StopFinder(3pm)'s B<results> method for details

on the resolved values.

If $status has been created using B<new_p>, this function does not require

arguments. Otherwise, the caller must specify B<promise> and B<user_agent>

(see B<new_p> above).

=item $status->get_active_service

Returns a hashref describing the active service when a service is active and