HEAD-1731 add /opt/smartdc/sdc/man to sdc zone's default MANPATH
HEAD-1731 add /opt/smartdc/sdc/man to sdc zone's default MANPATH

kaizengarden/sdc-headnode,joyent/sdc-headnode,numericillustration/sdc-headnode,joyent/sdc-headnode,kaizengarden/sdc-headnode,numericillustration/sdc-headnode,numericillustration/sdc-headnode,kaizengarden/sdc-headnode,kaizengarden/sdc-headnode,joyent/sdc-headnode,joyent/sdc-headnode