<li><code>retitle</code> <var>bugnumber</var> <var>new-title</var>
<li><code>merge</code> <var>bugnumber</var> <var>bugnumber</var> ...
<li><code>unmerge</code> <var>bugnumber</var>
+ <li><code>tag</code> <var>bugnumber</var> [+-=] <var>tag</var> ...
+ <li><code>block</code> <var>bugnumber</var> <code>by</code> <var>bug</code> ...
+ <li><code>unblock</code> <var>bugnumber</var> <code>by</code> <var>bug</code> ...
</ul>
<p><code>reopen</code> with <code>=</code> or no originator address leaves