Elaborating extensively about the desired functionality wouldn't add much to this request, since it's pretty obvious from the title

The same "dhcp-option PROXY_HTTP"-functionality as was implemented in the iOS app last year.
The reason i personally would like to see this brought to the Android app as well, is described in my reaction in 2CGr2A6v's topic16143.html#p42164, but it can be useful for other purposes as well.