Add "noindex" on tag pages

Product Support
6

The noindex directive is delivered via both the response header and in the robots.txt file:

➜  ~ curl https://meta.discourse.org/tag/planned -I -X GET
HTTP/2 200 
date: Tue, 09 Feb 2021 14:38:52 GMT
...
x-robots-tag: noindex
...

➜  ~ curl https://meta.discourse.org/u/Falco -I -X GET
HTTP/2 200 
date: Tue, 09 Feb 2021 14:39:38 GMT
...
x-robots-tag: noindex
...

https://meta.discourse.org/robots.txt

User-agent: *
...
Disallow: /u
Disallow: /my
Disallow: /tag
...