[HTTPS-Everywhere] HTTPS to HTTP form submission warnings

[Richard Fussenegger, BSc]

This topic was already raised once in the past (see 
https://lists.eff.org/pipermail/https-everywhere/2011-June/000914.html) 
but I'd like to discuss it again because it's pretty annoying and might 
even be disturbing to new users of the extension.

I found that the main problem are websites that have the scheme hard 
coded on form action attributes. I therefore propose that the extension 
could parse the page and rewrite any URL pointing to the current domain 
that has the http scheme set instead of the secure one. I'm also willing 
to produce this feature but I don't know if this is even possible with 
an extension like HTTPS-Everywhere. You might be able to answer this or 
maybe you have some arguments why this would be a bad idea.

Richard