A proposal floating in the #IETF suggests to have “trusted proxies” for #HTTPS connections, able to decrypt the traffic. The proposal is in this Internet-Draft: ▻http://tools.ietf.org/html/draft-loreto-httpbis-trusted-proxy20
An alternative exploration of the use cases is at ▻https://github.com/http2/http2-spec/wiki/Proxy-User-Stories and a survey of possible solutions at ▻https://github.com/bizzbyster/TrustedProxy/wiki/Trusted-Proxy-Use-Case-Analysis-and-Alternatives
A very strong opposition to this proposal: ▻http://lauren.vortex.com/archive/001076.html