Merge branch 'release/0.6' into develop
Fix bug where re-subscribers with same names got incremented names
Fix cucumber step ambiguity
Update Clear response to indicate that admins are not unsubscribed
Restore description welcome message
Add moderation: /moderate and /unmoderate with /voice @name and /unvoice @name
Update /who response to note voice/mute status
Refactor relay-modifying tests to defer to ModifyRelay
Make ModifyRelay-based commands notify all admins
Extract subscription-modifying commands into ModifySubscription
Have ModifySubscription commands notify all subscribed admins
Add phone number to moderation-blocked messages to admins
Correct missing translation arguments in documentation
Add moderation documentation
Add login link
Highlight moderation and voice on subscribers list
Add missing missing_target message
Support finding subscribers by +-containing number
Strip whitespace before searching for subscribers
Identify anons to admins when they relay messages