%config contains user-configurable items.
New keys are ignored,
deleting keys or values will cause the program to fail.
List of OCI subroutine name prefixes,
without the leading 'OCI',
of subroutines to ignore (that is,
to not include in Oracle::OCI).
Most are skipped to save time in the edit-build-test-edit loop.
A few are skipped to avoid addressing less important implementation issues.