bug#3963: 23.0.94; Emacs on nextstep/Mac OS X should handle mailto: URLs

On 2009-07-29 20:29 (+0100), Leo wrote:

>> http://www.emacswiki.org/emacs/MailtoHandler
>
> There are already a few functions to handle mailto in Emacs for
> example url-mailto.

I have tried that but didn't manage to make it do anything useful. It
requires RFC2368 decoding, then splitting URLs fields, then RFC2047
decoding. URL-MAILTO does not seem to do those. Here's a test URL:

mailto:test@invalid?subject=%3d%3fUTF-8%3fB%3fVGVzdGluZyDigJ1zdHVmZuKAnQo%3d%3f%3d&cc=test2@invalid