tracker-extract: Updated man page to include env var TRACKER_EXTRACTOR_RULES_DIR
tracker-extract: Updated man page to include env var TRACKER_EXTRACTOR_RULES_DIR

hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker