1. Reset option is no longer supported.

2. -o's (+ or -) option no longer supported.

3. Fine granularity network statistics are made available through kstats. 
   See reference material for details.

4. dlstat supports subcommands. The subcommands are designed to correspond 
   to dladm's subcommands. i.e. dladm show-phys lists physical links input
   to dlstat show-phys, dladm show-link lists links input to dladm show-link,
   so on and so forth.