This allows us to have more complex test files where an action is taken, then
we test something, then another action is taken, etc.
Changes to test files are required so that URL is defined after all the
required settings are set.
Changes to the result files are either whitespace changes due to above logic
changes, or printing out a SQL Result header before each result. I figured it
was useful.
Gosh, this was completely broken previously. A number of different scenarios now work.
I have used some of the state I've seen in a largish production database with the
presence of NULL and empty strings. I've assumed that empty string should be treated
as is-not-defined. Happy to be talked out of that.
Closes#281.