A memory leak occurs on lines 209 and 213 because the config is not freed
in the error case. The interface to add_config() seems less than ideal -
it would be better if it copied any data necessary from the config and the
caller freed it.
illumos/illumos-gate@ddfe901b12
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: sara hartse <sara.hartse@delphix.com>
d49e9be14f