Multiple Dutch waste management services use the same API structure

[bo0tzz]

The code for hvcgroep_nl should work with very few changes for multiple other Dutch waste management services, including (but not limited to) https://www.mijnblink.nl/wanneer and https://afvalkalender.cyclusnv.nl/.

Unfortunately I won't be able myself to make a code contribution for this anytime soon, but I thought I'd put the knowledge out here anyways for someone else :)