[spec] The updated speculative specification is now up

[Sean Conner]

  The updated protocol (only) specification is now up and can be read at:

	https://gitlab.com/gemini-specification/protocol/-/blob/master/specification.gmi

  I haven't closed the issues related to this, but I did comment on each
issue:

	https://gitlab.com/gemini-specification/protocol/-/issues

  The specification has been run by Solderpunk and he had no major issues
with what has been written.

  As a reminder---this is *just the protocol* itself.  I have yet to finish
up on the text format.

  -spc