[openrailwaymap] Re: Tagging decision: ebicab, atc, convel, zub123

> 1. Render compatible systems > > consequences: > a) we proceed with this PR as is > b) we have to retag Portugal, Sweden, Norway and Finland (I'm willing to > help) > c) we should create an additional PR to also render `railway:zub=123` > d) Denmark should be tagged with `railway:zub=123` If we are going to retag things, I still think that defining a railway:train_protection=* system is much less work. Think about your PRs: how many railway:foobar=no tags do you want to get a "proper" selector for "no system".