Add docs

Author: Manishearth

homu/html/index.html

@@ -46,9 +46,9 @@ <h3>Commands</h3>
             <li><code>r=NAME (SHA)</code>: Accept a PR on the behalf of NAME.</li>
             <li><code>r-</code>: Unacccept a PR.</li>
             <li><code>p=NUMBER</code>: Set the priority of the accepted PR (defaults to 0).</li>
-            <li><code>rollup</code>: Mark the PR as likely to merge without issue, implies <code>p=-1.</code></li>
+            <li><code>rollup</code>: Mark the PR as likely to merge without issue, short for <code>rollup=always</code></li>
             <li><code>rollup-</code>: Unmark the PR as <code>rollup</code>.</li>
-            <li><code>rollup=maybe|always|never</code>: Mark the PR as "always", "maybe", and "never" rollup-able.</li>
+            <li><code>rollup=maybe|always|iffy|never</code>: Mark the PR as "always", "maybe", "iffy", and "never" rollup-able.</li>
             <li><code>retry</code>: Signal that the PR is not bad, and should be retried by buildbot.</li>
             <li><code>try</code>: Request that the PR be tested by buildbot, without accepting it.</li>
             <li><code>force</code>: Stop all the builds on the configured builders, and proceed to the next PR.</li>