librenms/sql-schema/108.sql

INSERT INTO config (config_name,config_value,config_default,config_descr,config_group,config_group_order,config_sub_group,config_sub_group_order,config_hidden,config_disabled) values ('email_html', 'false', 'false', 'Send HTML emails', 'alerting',0,'general',0,'0','0');