git: 6c9506559080 - main - Escape any '.' characters in sysctl node names

[Hans Petter Selasky]

On 7/22/21 6:23 PM, Alan Somers wrote:
> commit 6c9506559080da2914749bf611225d7c0a153609
> Author:     Alan Somers<asomers at FreeBSD.org>
> AuthorDate: 2021-07-21 21:11:00 +0000
> Commit:     Alan Somers<asomers at FreeBSD.org>
> CommitDate: 2021-07-22 16:22:48 +0000

If the strings come from user-input or hardware, why not just allow a-z 
and 0-9 and a few other characters?

There are surely more illegal characters than just '.', like \n \r \t 
<space> that we don't want to see in sysctl names.

--HPS