Modify query_error() to log errors to a database table instead of displaying them on the screen. This should

let us more easily debug difficult or intermittent issues that users may not report. Add a cron to report logged
errors to appdb admins every night.  Implement some basic unit tests for the new error logging code

tables/create_tables

@@ -30,3 +30,5 @@ mysql -p -u root < buglinks.sql
 echo Adding monitors
 mysql -p -u root < monitors.sql
 
+echo Creating error logging tables
+mysql -p -u root < error_log.sql

tables/error_log.sql

@@ -0,0 +1,14 @@
+use apidb;
+
+drop table if exists error_log;
+
+create table error_log (
+  id            int not null auto_increment,
+  submitTime    datetime,
+  userid        int not null default '0',
+  type          enum('sql_error', 'general_error'),
+  log_text      text,
+  request_text  text,
+  deleted       bool,
+  key(id)
+);