SNCB: switch to new rest.exe API

[derhuerst]

As discussed thoroughly in iRail/iRail#466, it seems like SNCB/NMBS has shut off their mgate.exe-flavoured API in favour of a (mostly) rest.exe-style one. We should check if the (somewhat outdated) rest.exe implementation in #134 can be used to query it.

Some relevant technical details:

• internal NMBS API used by iRail is being shut down iRail/iRail#466 (comment)
• internal NMBS API used by iRail is being shut down iRail/iRail#466 (comment)
• internal NMBS API used by iRail is being shut down iRail/iRail#466 (comment)
• internal NMBS API used by iRail is being shut down iRail/iRail#466 (comment)
• internal NMBS API used by iRail is being shut down iRail/iRail#466 (comment)

cc @Muspah @schildbach

related: public-transport/transport-apis#59

[Muspah]

To give you a basic idea of the output:

https://gist.github.com/Muspah/9a82b51151b4529f6d459e2bfd5679fb
https://gist.github.com/Muspah/7713ebfc36e9a355077ce64c52675293
https://gist.github.com/Muspah/dc3e679a23ed4e4bc9f24dba39f6387b
https://gist.github.com/Muspah/587547affc95e79ed2feec3c1f78fe83

[derhuerst]

public-transport-enabler equivalent of this Issue: schildbach/public-transport-enabler#502

[thatjade]

FYI: iRail API is still working as expected. (seen in Hyperrail for Android or Railer for iOS)
While Information sent to DB RIS and then HAFAS are usually quick and accurate it often lacks platform changes.
Docs can be found here. https://docs.irail.be/