search lacks results

The same queries as in #17 when entered through the website:

* "HWSN" works as expected
* "hwsn" returns nothing
* "1761 4.7" does returns things around kilometer 9
* "1761 4,8" returns a crossing at 14.8 and track kilometer 9

None of the latter queries returns the crossing at 4.744 or any of the track positions at 4.*.