Log Message:
Update to 0.84, this closes PR pkg/30130.

Changes:

-) libclamav:
    + JPEG exploit detector now also checks embedded Photoshop thumbnail images
    + archive meta-data scanner (improves malware detection within encrypted
      archives)
    + support for TNEF (winmail.dat) decoding
    + support for all tar archive formats
    + MD5 implementation replaced with a slightly faster one
    + improved database reloading with reference counter
    + database updateable false positive eliminator
    + speed improvements
    + various bugfixes

-) clamd:
    + VirusEvent now sets CLAM_VIRUSEVENT_FILENAME and CLAM_VIRUSEVENT_VIRUSNAME
      environment variables

-) clamav-milter:
    + improved database update detection when not --external

-) clamscan:
    + new options --include-dir and exclude-dir
    + new option --max-dir-recursion

-) freshclam:
    + new directive LocalIPAddress