Spam with broken URI (Zero-Width-Space Unicode characters)

I received this phishing spam  yesterday. That was not the first of
this kind. (attached, w/o the image)

I thought about this and wrote this uri-bad-unicode.cf Insert it
in your local.cf or in /etc/spammassin, adjust the scores and restart
spamd. Comments welcome.


I am pretty sure there are more nasty Unicode characters. Also we should
make sure that Unicode is properly normalized. See RFC 8264 and
Unicode::Precis::Preparation on CPAN.