title: can't create server-admin in couchdb
body: <p>I'm following the couchdb security documentation (<a href="http://docs.couchdb.org/en/1.6.1/intro/security.html" rel="noreferrer">http://docs.couchdb.org/en/1.6.1/intro/security.html</a>) to try to create a server-admin using cURL: curl -X PUT $HOST/_config/admins/anna -d '"secret"'</p>
  
  <p>When I do this, I get an error:
  {"error":"not_found","reason":"Database does not exist."}</p>
  
  <p>I'm on v2.0 so I don't known if something has changed since the 1.6 version of the documentation.  I can create server-admins just fine using fauxton. Any ideas?</p>