comments.py change request.

Hey all,

I'm not sure if this is the right place to send this,
but my wife just ran into a, well, not exactly a bug,
but more of a mis-feature in the way PyBlosxom handles
comments.  She entered a comment, and then hit refresh
on the page, and the same comment was entered again.

Post-Redirect-Get is a standard Web Application Pattern
to avoid this sort of thing.  There is more information
about it at:
http://en.wikipedia.org/wiki/Post/Redirect/Get
but the basic idea is that the Post form should, instead
of returning the page, return a redirect to a GET page,
so that the user can bookmark it, or reload it, without
any ill effects.

I took a quick look at how I could implement this, but
it's been quite a while since I've done any PyBlosxom
hacking, and I couldn't figure out how to send the
redirect from within the comments.py plugin.  If anyone
had some pointers, I'ld be happy to help get this working
in any way I could.

Thanks,
Blake.

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