[ANN] Specification update

[Stephane Bortzmeyer]

On Sun, Nov 07, 2021 at 03:50:09PM +0000,
 Solderpunk <solderpunk at posteo.net> wrote 
 a message of 75 lines which said:

> 2. The use of the TLS `close_notify` mechanism is now mandatory (see
> sections 1.1 and 4).

This will be hard to enforce:

gemini://gemini.bortzmeyer.org/software/lupa/stats.gmi

48.3 % of URLs do NOT send a proper TLS shutdown (application
close). Even 36.1 % of those who return status 20 are in that case.