add scanner module to extract domain from NTLM challenge
Change to example.com as the default domain
Slight tweak to description/author email formatting
Module cleanup, error handling, and reporting
Merge pull request #1 from hmoore-r7/smtp_ntlm_domain

Module cleanup, error handling, and reporting
Adds a smtp ntlm domain scanner, lands #4241
Merge remote-tracking branch 'upstream/master'