- Fix support for catching "on delete cascade" with PostgreSQL < 7.3. - Clean up a few remaining "-S" references in the usage and a few other   places. - Don't use table aliases where we only have one table.
- Fix support for catching "on delete cascade" with PostgreSQL < 7.3.
- Clean up a few remaining "-S" references in the usage and a few other
  places.
- Don't use table aliases where we only have one table.


tdefilip/opennms,tdefilip/opennms,tdefilip/opennms,roskens/opennms-pre-github,aihua/opennms,aihua/opennms,tdefilip/opennms,aihua/opennms,roskens/opennms-pre-github,aihua/opennms,rdkgit/opennms,rdkgit/opennms,aihua/opennms,tdefilip/opennms,rdkgit/opennms,rdkgit/opennms,aihua/opennms,aihua/opennms,aihua/opennms,tdefilip/opennms,roskens/opennms-pre-github,roskens/opennms-pre-github,tdefilip/opennms,rdkgit/opennms,rdkgit/opennms,roskens/opennms-pre-github,roskens/opennms-pre-github,tdefilip/opennms,tdefilip/opennms,roskens/opennms-pre-github,roskens/opennms-pre-github,aihua/opennms,rdkgit/opennms,rdkgit/opennms,rdkgit/opennms,rdkgit/opennms,roskens/opennms-pre-github,roskens/opennms-pre-github,roskens/opennms-pre-github