sshkeys enabled on trac again

[Dima Pasechnik]

After some struggle, I've managed to successfully enable sshkeys
plugin on trac.sagemath.org

Please test.

Note that you might need to refresh various web pages on trac.

Dima

[Dima Pasechnik]

Sorry, I had to disable it again, as there are more errors related to
this plugin popping up.
Something something about non-existing files/directories. :-(

So that's not the end of the story.

Dima


>
> Dima