[Bug 48191] New: Add a captcha to the feedback page

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48191

Bug ID: 48191
           Summary: Add a captcha to the feedback page
           Product: Wine-Testbot
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

We are now regularly getting spam on the captcha page. Spammers really have
time to waste!

So we should add a captcha. Despite its simplicity the one on the registration
page still seems to work so it should be a simple matter of porting it over.