Hi Rafael,

I am totally fine with this change, and especially with you also adding the 'admin_level=2' tag that Madrid was missing.

That said, and that is good thing, things have somewhat changed from a couple of years ago and become more consistent.

A few years ago, there were quite a few country capital nodes having 'capital=2' if I remember well, instead of 'capital=yes'

Even today, the situation isn't as simple as the Wiki suggests. E.g., if you just select 'capital=yes' in Overpass Turbo, you end up with 216 nodes, which is more than what is generally seen as country capitals:
https://overpass-turbo.eu/

If you select on both 'capital=yes' and 'admin_level=2', you end up with 198 nodes:
https://overpass-turbo.eu/s/1xDp

Some countries are just more complicated. Quite a few, including the Netherlands where I live, have both a legislative, and an executive capital, both of which may be tagged with 'capital=yes' and 'admin_level=2' as is the case in South Africa with Pretoria as executive and Cape Town as legislative (but not the Netherlands). 

South Africa even has a third 'capital=yes' tagged node for Bloemfontein, and is the 'judicial' capital (but has no 'admin_level=2' tag like the other two nodes).
