Require authentication to view /help

The /help page no longer requires authentication. It should be protected to avoid showing version number and 'up to date (or not)' to unauthenticated users.

cc @rspeicher

As @DouweM noted, it would also be acceptable to simply not display version and 'up to date' if user is unauthenticated.

Reassigned to @rspeicher

Milestone changed to 8.0

mentioned in commit ebcd503e

mentioned in merge request !1415 (merged)

Status changed to closed by commit ebcd503e

mentioned in commit ae3fba6c

mentioned in commit 55d77110