Log Message:
Update spamprobe to 1.4b (PKGNAME changed to 1.4.2).

Changes in 1.4a:
This release fixes a bug in decoding malformed base64 encoded data that
manifested itself in some architectures. Also corrects a typo in the online
help. Some code cleanup and minor performance tweaks were added as well.

Changes in 1.4b:
This release fixes pair of bugs related to messages with no lines in their
bodies. No new features were added.