Highlight field not used, when setting variable apachesolr_hl_highlight

This is a minor issue now, but is going to come up shortly, and will break custom modules using this variable.

The variable apachesolr_hl_highlight is not currently available through the apachesolr admin screens, but is checked in apachesolr_search.module:268 to override the solr server field highlighting settings

It is misspelled in apachesolr_search.module (an extra 't'), and will not use the admin settings (once implemented), if not also misspelled

- $params['hl.fl'] = variable_get('apachesolr_hl_fieldtohightlight', NULL);
+ $params['hl.fl'] = variable_get('apachesolr_hl_fieldtohighlight', NULL);