* release/21.06:
Bump boulder version to release-2021-06-01
Install zip if not present (#18)
Create (empty) challenges table to prevent GUI error (#17)
Don't show dbdata backups as restorable from gui
Cosmetic: don't report application as down when it is not
* release/21.05:
Bump boulder version to release-2021-05-17
Reduce frequency of logging timestamps
Bump boulder version to release-2021-03-29
Backup database as part of update
Bump boulder version to release-2021-02-22
Bump docker-compose to version 1.28.5
Show revoked+expired certificates in both the revoked and the expired lists
* release/21.03:
Prevent warning when updating LabCA
Lower frequency of looking for file changes of hostname and rate-limit policies
Do not wait for boulder startup when setup is not yet complete
Wait longer for server to be ready before requesting first certificate
Tweak description string of whitelist mode
Fix config substitutions for whitelist mode (#15)
Hold off on starting boulder until setup wizzard is completed
Make installer more robust
Make config substitutions more robust
Stick to release tags even if there are newer commits on master
Minor tweaks
Fix query buildup when combining tables
* release/21.02:
Deal with old table names not existing on fresh installations
Some code cleanups
Don't show error when there are no backups yet
Fix issue with config when email is not (yet) configured
Bump boulder version to release-2021-02-08
Handle some more error situations
Convert to go module because of issue with hcl/printer in GOPATH mode
Make docker install work also on Ubuntu
Set HOME in sudo commands to target user's home directory
Add some more admin screenshots to README
Cosmetic: update year