add gemini protocol support

[rawnix-org]

Add support for twtxt files on gemini space. (gemini://)

Shouldn't be too complicated to add.

[zzo38]

I agree. The implementation would be as follows:

• Find the domain name in the URL, and connect to it on port 1965, using TLS, and enable SNI. (Everything following is encrypted)

• Transmit the entire URL (including gemini:// and the domain name) followed by a carriage return and line feed.

• The first line of the response is the status line; the first character of that line is a digit indicating the status (where 2 means OK). The rest of the lines after the first line is the contents of the requested file.