Gemini ALPN ID

[Jannis R]

hey,

I was wondering what you think about using TLS with ALPN [1][2]? It eliminate doubt about which protocols a server speaks.

In my Node.js Gemini client & server [3], I use the ALPN protocol identification sequence `gemini` for now, but that seems to be incompatible with all other clients & servers not using it. [4]

Jannis

[1] https://en.wikipedia.org/wiki/Application-Layer_Protocol_Negotiation
[2] https://tools.ietf.org/html/rfc7301
[3] https://github.com/derhuerst/gemini
[4] https://github.com/derhuerst/gemini/issues/5