Ditch the captcha-solve-on-page-edit code entirely, no use
Turns out Mediawiki merged the captcha stuff into core in 1.18
and nerfed 'captchaword', so the captchas aren't trivially
scriptable any more (I never understood why they made these
scriptable in the first place, but hey). So this code is just
no use and never going to work any more, let's get rid of it.
For Fedora wiki purposes, we're now relying on never having to
solve a captcha for any of the edits we want to do, and working
with the admins to ensure that.
Also adds a 15 second wait before we re-try the edit, when page
edit fails.
Update changelog for 2.1.10.