Add HTTP/2 + Websocket Support to the BrowserUp Proxy via Its Netty-based L

Our open-source Proxy, the BrowserUp proxy is used by testers to capture HTTP level traffic into HAR files. Currently, the BrowserUp Proxy only has support for HTTP/1. It is built on top of a fork of Our open-source Proxy, the BrowserUp proxy is used by testers to capture HTTP level traffic into HAR files. Currently, the BrowserUp Proxy only has support for HTTP/1. It is built on top of a fork of littleproxy that we have commit rights to. These changes will be needed to be made first in LittleProxy, then utilized from the Br...