What version are you running?
rbtools 0.2 rc2 - dev
What's the URL of the page this enhancement relates to, if any?
Describe the enhancement and the motivation for it.
Post review will reopen discarded existing review after update.
This is useful parameter which avoid developer to "clicking" when they
communicate with ReviewBoard as post-review script.
What operating system are you using? What browser?
Please provide any additional information below.