[spec] Oustanding issues

[Petite Abeille]

> On Dec 28, 2020, at 00:21, Sean Conner <sean at conman.org> wrote:
> 
> Clients (in my opinion) should strip out such sequences, if only
> because this is trying to influence how the client display text.

Agree. Actually, client MUST sanitize all input, irrespectively of origin. Not doing so would be highly irresponsible.

This would be easier if META would not legally contain any control characters to start with.