Check register attempt for "spaminess" on stopforumspam.com
Please see http://www.stopforumspam.com/usage before enabling for restrictions and conditions
Assumes registration by POST with variables email and uname. This is true of the register scripts in
core and the profile module.
If the registrant is determined to be a spammer, the account is not created. The determination is
made by inspecting the confidence level returned by the stopforumspam API. If that confidence, for
any of user name, email or IP address, exceeds the configured $minimumConfidence, the registration
is denied.