Batch-mode query from file should submit automatically

Right now, when submitting a batch-mode query with -f, eg.

cbq -q -b on -f test.sqlpp

test.sqlpp must end in "\;", the same as when using "cbq -b on" in interactive mode. If the trailing "\;" is absent, cbq does not submit the queries and produces no output. This seems undesirable. It is probably good that "\;" works, but it should be implied at the end of a file.