3602 mdb should tab complete global symbols
Reviewed by: Matt Amdur <matt.amdur@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Carlos Cardenas <cardenas12@gmail.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Dan McDonald <danmcd@nexenta.com>