Add restrict_copy_delete field to config.copy_status.

Add restrict_copy_delete field to config.copy_status.

Add the column definition in 002.schema.config.sql.
Add the field to the class ccs in fm_IDL.xml.
Set the restrict_copy_delete column to true for the "magical"
statuses (1,3,6,8) in 950.data.seed-values.sql.
Add restrict_delete as essential column to config.copy_status in
OpenILS::Application::Storage::CDBI::config

Signed-off-by: Jason Stephenson <jstephenson@mvlc.org>
Signed-off-by: Jason Etheridge <jason@esilibrary.com>