Update to SQL query now that _point_order field is gone from relational functions.
Fix to properly handle comma-separated production type names when building the initial list of production types.
Fixes to 2 files to handle NULL fields in the rows they retrieve from the parameter database.
Now handles the old way of specifying quarantine of units identified by trace.
Fix to handle NULL in the trace_result_delay_id field.
More handling of parameters for tracing and its consequences.