Fix for (unsupported) SQLITE_USE_FCNTL_TRACE code.
Add a test to whereI.test that uses a multi-column PK.
Fix a harmless compiler warning in the FTS4 logic.
Remove unused code (previously #ifdef-ed out) from btree.c.
Improved comments on the OR-optimization logic in the query planner.
Avoid unnecessary cursor opens and seeks when running the OR-optimization
on a WITHOUT ROWID table.
Change the name of the Index.autoIndex field to Index.idxType and provide
symbolic names for the various values of that field rather than using
magic numbers.
Fix harmless compiler warnings.
Remove an incorrect assert() in the sorter.
Revise how OSTRACE reports logically boolean results in the Win32 VFS.