There are TODO comments in the code about SETTINGS_HEADER_TABLE_SIZE support. Proper would:

• Give the ability to setup a max table size at http2.Transport and http2.Server
• Send the max table size in the settings frame
• Apply received SETTINGS_HEADER_TABLE_SIZE capped by the max table size defined

I have a working implementation. I need to write tests and I will submit it.

Cc @bradfitz