@scap for your 2 questions:
1. Not sure that usecase is explicitly supported- if you can come up with a gist then we’ll see it it can be reworked into shape
2. Weird - but TBH out of the 3 implementations, Netty is the least used - undertow seems to be a more popular option. Once again , if you can do a gist that’d be great. Is it possible for you to switch to jetty/undertow in the meantime?