support all HAFAS methods

see also
- https://github.com/marudor/BahnhofsAbfahrten/commit/5f50c56701925f578c5704ee1aa530208452447e#diff-7629496e628fff5702342f54862836a6R35-R73
- https://github.com/marudor/BahnhofsAbfahrten/pull/226/files

related: #133, #85, #134