Because we want to avoid use cases where an admin could "bulk unblock," and because we eventually want to deprecate the special:unblock page, we will direct all organic traffic to special block:
Story
Given that I have navigated to Special:Unblock without a specified target in the URL, then I should be redirected to Special:Block, where I can search for a target and unblock any active blocks.
Example redirect URL:
https://test.wikipedia.beta.wmflabs.org/wiki/Special:Unblock/
Example valid URL (no redirect)
https://test.wikipedia.beta.wmflabs.org/wiki/Special:Unblock?username
https://test.wikipedia.beta.wmflabs.org/wiki/Special:Unblock?001.203.44
https://test.wikipedia.beta.wmflabs.org/wiki/Special:Unblock?username?blockID12234
