The support page is the go-to page for the "how to get help" question,
which previously was hidden inside the TPA-RFC-2 standard.

This basically copies that part of the TPA-RFC-2 policy, but could
eventually diverge without needing to update the policy, for informal
stuff.

I started working on this page while trying to address
#40382 ("document the triage process"), but I'm not
actually sure triage documentation should go there, as this page feels
more targeted at users, and only users.

howto/incident-response.md would seem like a better space for this.

Also, this is a toplevel page because it's more important than
everything else, so it warrants its own special space.

doc.md

@@ -9,7 +9,7 @@ This documentation is primarily aimed at users.
  * [bits-and-pieces](doc/bits-and-pieces)
  * [extra](doc/extra)
  * [hardware-requirements](doc/hardware-requirements)
- * [how-to-get-help](doc/how-to-get-help)
+ * [how-to-get-help](support)
  * [naming-scheme](doc/naming-scheme)
  * [reporting-email-problems](doc/reporting-email-problems)
  * [services](doc/services)