Do not abort _PRT repair on a single subpackage failure.

Always examine all subpackages for reversed entries.
Add auto-serialization support for ill-behaved control methods.

This change adds support to automatically mark a control method as
"serialized" if the method creates any named objects. This will
positively prevent the method from being entered by more than one
thread and thus preventing a possible abort when an attempt is
made to create an object twice.

Implemented by parsing all non-serialize control methods at table
load time.
Comment update - no functional change.

Change all instances of "sub-package" to "subpackage" for
consistency.