I have actually looked at it, in my endless quest to stop having Naviserver/AOLserver be my favorite web server. ;->
I'm going to be giving it another go here in a bit, I got a small little personal project where I'm going to make a serious attempt to curse at it for a bit.
I'm actually curious whether someone has formalized message formats/grammar, protocol specs (state management, timing specs,...) for QUIC or IMAP, in some parseable form other than free-form text.