Links in supybot meeting lists are not generated correctly

[tflink]

In the meeting list: ​https://supybot.buildbot.net/meetings/buildbot/2015/

The links to minutes and logs are all broken because they omit 'meetings/buildbot/2015' from the URLs.

For example, the link to the 2015-11-03 meeting html log is: ​https://supybot.buildbot.net/buildbot.2015-11-03-16.32.log.html

It should be: ​https://supybot.buildbot.net/meetings/buildbot/2015/buildbot.2015-11-03-16.32.log.html

[dustin]

​https://github.com/buildbot/buildbot-infra/blob/master/roles/supybot/files/mkindex.sh is the script in question