"drush config-edit" causes "PHP Fatal error: Call to undefined function config_import()"

[hansfn]

# drush config-edit system.site
....
Drush command terminated abnormally due to an unrecoverable error. 
Error: Call to undefined function config_import() in /.../commands/core/config.drush.inc, line 283

There has been some changes to the config functions lately - ref https://drupal.org/node/2065313 - but I'm not sure if that is relevant here.

[weitzman]

Background info and patch at https://drupal.org/node/2012586

[weitzman]

Ran out of gas before I get investigate config test fails but the config commands are all working for me now with manual testing. Will get Unish passing soon, and then see where we are at for D8 support.

Thanks to Clemens to first authored this patch. I heavily modified from there.