spam 4.5.x-1.0

This is a complete rewrite of the original spam module, as used to be hosted on KernelTrap.org.

Features:

• Written in PHP specifically for Drupal.
• Highly configurable.
• Automatically detects and unpublishes spam comments and other spam content.
• Automatically learns to detect spam in any language using Bayesian logic.
• Automatically learns and blocks spammer URLs.
• Automatically blacklists IPs of learned spammers, preventing them from posting additional spam and wasting database resources.
• Detects repeated postings of the same identical content.
• Detects content containing too many links, or the same link over and over.
• Supports the creation of custom filters using powerful regular expressions.
• Can notify the user that his or her content was determined to be spam, preventing confusion over why their content doesn't show up.
• Can notify the site administrator in an email when spam is detected.
• Provides 'report as spam' links allowing users to easily help detect spam.
• Provides simple administrative interfaces for reviewing spam content.
• Provides comprehensive logging to offer an understanding as to how and why content is determined to be or not to be spam.