Fix the e_walauto.test script so that it works on windows.
Experimental opimizations to speed up FK constraint CASCADE and SET NULL action processing.
Fix some comments in fkey.c. Add tests to fkey8.test.
Experimental opimizations to speed up FK constraint CASCADE and SET NULL action processing.
Simplify the implementation of the "header-value" pragmas (schema_version,
user_version, freelist_count, and application_id) by making them more
table-driven.
Experimental "PRAGMA data_version" command for detecting when another process
has changed the database file.
Adding test cases for the "PRAGMA data_version" command.
Update the PRAGMA data_version command so that it reponse to changes made
by a shared-cache database connection, and also to changes made by the same
database connection.  Add test cases to verify the new behavior.
Add the "PRAGMA data_version" command for checking to see if a database has
been modified.
Merge the PRAGMA data_version command and the enhancements to FK query planning
from trunk into the sessions branch.