GUAC-1213: Document and store user timezone such that it is used for all date/time comparisons.

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

@@ -127,12 +127,14 @@ CREATE TABLE guacamole_user (
   -- Time-based access restriction
   access_window_start    time,
   access_window_end      time,
-  access_window_timezone varchar(64),
 
   -- Date-based access restriction
   valid_from  date,
   valid_until date,
 
+  -- Timezone used for all date/time comparisons and interpretation
+  timezone varchar(64),
+
   PRIMARY KEY (user_id),
 
   CONSTRAINT username

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.8.sql

@@ -26,7 +26,6 @@
 
 ALTER TABLE guacamole_user ADD COLUMN access_window_start    time;
 ALTER TABLE guacamole_user ADD COLUMN access_window_end      time;
-ALTER TABLE guacamole_user ADD COLUMN access_window_timezone varchar(64);
 
 --
 -- Add per-user date-based account validity restrictions.
@@ -34,3 +33,9 @@ ALTER TABLE guacamole_user ADD COLUMN access_window_timezone varchar(64);
 
 ALTER TABLE guacamole_user ADD COLUMN valid_from  date;
 ALTER TABLE guacamole_user ADD COLUMN valid_until date;
+
+--
+-- Add per-user timezone for sake of time comparisons/interpretation.
+--
+
+ALTER TABLE guacamole_user ADD COLUMN timezone varchar(64);