Micropub: "slug" property ignored

[cweiske]

While trying to do this:

Create a note with a defined URL slug (path) via Micropub

$ curl -X POST -H 'Content-Type: application/x-www-form-urlencoded'\
    -H 'Authorization: Bearer abc'\
    -d 'h=entry' -d 'content=this is a slugtest!' -d 'slug=slugtest'\
    'http://known.bogo/micropub/endpoint'
Post created at server
http://known.bogo/2016/this-is-a-slugtest

I encountered this error:

Slug is ignored and known creates the path itself from the content