adpatch operations

1. prompts for required information about the patch
2. unloads patch metadata and verifies prerequisite patches have been applied (need most recent snaphosts:run adadmin->maintain snapshots option)
3. uploads patch history information to the database from previous run (if needed).
4. reads and validates the patch driver file.
5. reads product file driver files.
6. extracts object modules from the product libraries (so it can compare version numbers on the object modules it extracts)
7. compares the version numbers of the existing files against the files in the patch (version checking)
8. backs up any existing files that will be changed.
9. copies files
10. archives files into libraries.
11. relinks executables.
12. generates Java archive (JAR) files.
13. compiles JSP files.
14. updates database objects.
15. maintains the MRC schema, if needed.
16. compiles invalid database objects.
17. generates forms, reports, message, and graphics files.
18. runs AutoConfig to update configuration files, if any template files are introduced or updated by the patch.
19. saves patch history information to the database.