Clean up and modernize

• Renamed and fixed configure.ac to run with newer automake-tools
• Cleaned up files

Maintenance release 1.4.0.2

This release collects several updates to the last officially released simscan version 1.4.0

Build and license issues:

• Added GPL license version 2.0
• Made several changes to allow building on with strict compiler settings
• Cleanup of files

Bugfixes:

• Fixed issue in combination with a ripmime-problem (Thanks to Gustavo Castro); see http://permalink.gmane.org/
• Do no longer check for existing clamav-database when set via --enable-clamavdb-path
• added missing permissions S_IRUSR | S_IWUSR to open() (Thanks to Jason Frisvold)
• Make simscan aware of clamav cld files (Thanks Bob Maple)
• Fix ripmime working directory (Thanks Gladiston Justini)
• Fix --enable-dpsam-args (Thanks Jean-Daniel Bonnetot)
• Prevent double virus scanning (Thanks Gerard Earley)
• Fix retrieval of SpamHits and ReqHits (Thanks anonymous)
• Add SpamAssassin's ReqHits to log line (Thanks anonymous)
• Add SPAM PASS log line (Thanks anonymous)
• Improvement patch (Tom Collins):
  • Clamdscan scans the message file instead of the message file and attachment
  • Don't pass messages over 250k to spamassassin
  • Spam scanning before virus scanning
  • Lowercase FROM and TO addresses
  • write spam_fd before calling is_spam()
  • fix str_rstr() call to require complete match
• simscan directory umask fix (John Simpson)
• band-aid simscanmk NFS timing issue on solaris - Tom Collins
• strsep bug in Solaris - Tom Collins
• set exit code on errors - Jeremy Kister
• fix compile warning issues with long versus int - Jeremy Kister
• add pid to debug messages - Jeremy Kister
• RFC2822 Received field compliance - Tullio Andreatta
• Support daily and main .inc and .cvd files (John Simpson)
• Fixed a few compiler warnings (Jason Frisvold)
• simcontrol lookups should be lowercase (Jason Frisvold)
• lowercase all strings in the simcontrol.cdb file (Jason Frisvold)