Make CSRF salt per-user instead of per-request
Summary:
Fixes T8326. This removes calls to PhabricatorStartup from places that daemons may access.
This salt doesn't need to be global; it's embedded in the token we return. It's fine if we use a different salt every time. In practice, we always use the same viewer, so this change causes little or no behavioral change.
Ref T8424. For Spaces, I need a per-request cache for all spaces, because they have unusual access patterns and require repeated access, in some cases by multiple viewers.
We don't currently have a per-request in-process cache that we, e.g., clear in the daemons.
We do have a weak/theoretical/forward-looking attempt at this in PhabricatorStartup::getGlobal() but I'm going to throw that away (it's kind of junky, partly because of T8326) and replace it with a more formal mechanism.
Test Plan:
- Submitted some forms.
- Grepped for csrf.salt.
- Viewed page source, saw nice CSRF tokens with salt.
- All the salts are still the same on every page I checked, but it doesn't matter if this isn't true everywhere.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D13151