Remove broken sfx_map code
New config option - regex that drops metrics
Merge pull request #65 from stopdropandrew/remove-sfx-map-add-new-exclude-options

Remove sfx map add new exclude options
Revert "Merge pull request #65 from stopdropandrew/remove-sfx-map-add-new-exclude-options"

This reverts commit ce0ff65bcf38159d12806c9e849ed63df465fbf6, reversing
changes made to e2b906107411b1476bcf9629859d404294191a32.