Enforce that global locks have keys shorter than 64 characters
Fixes T7484. There's a bunch of spooky mystery here but the current behavior can probably cause problems in at least some situations.
Also moves a couple callsigns to monograms (see T4245).
- Faked a short lock length to hit the exception.
- Updated normally.
- Grepped for other use sites, none seemed suspicious or likely to overflow the lock length.
Reviewed By: btrahan
Maniphest Tasks: T7484
Differential Revision: https://secure.phabricator.com/D12263