GUACAMOLE-317: Add "failover_only" column to database schema for Guacamole connections.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql

@@ -108,6 +108,7 @@ CREATE TABLE guacamole_connection (
 
   -- Connection Weight
   connection_weight        integer,
+  failover_only            boolean NOT NULL DEFAULT FALSE,
 
   -- Guacamole proxy (guacd) overrides
   proxy_port              integer,

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.14.sql

@@ -23,3 +23,10 @@
 
 ALTER TABLE guacamole_connection
     ADD COLUMN connection_weight int;
+
+--
+-- Add failover-only flag
+--
+
+ALTER TABLE guacamole_connection
+    ADD COLUMN failover_only BOOLEAN NOT NULL DEFAULT FALSE;