Log Message:
* Convert to USE_TOOLS+=itools instead of including nbitools/buildlink3.mk.

* Fully convert to pkginstall framework by properly using OWN_DIRS*
  to manage required directories during package installation and
  deinstallation.

* Drop the need to explicitly set PREFIX in the package Makefiles.  We
  now install into ${LOCALBASE} like all other pkgsrc packages and use
  symlinks and file copies to put the right files into ${IMDICTDIR}.

* Change default dependency relationship in sj3-lib/buildlink3.mk to a
  build dependency since it the package only installs headers and a
  static library archive.

* Move some important setup instructions from the DESCR file to MESSAGE
  files so that the admin will see them at package installation.

* Rewrite the sj3 rc.d script so that all necessary directories are
  created before the daemon is started.

* Miscellaneous touch ups to the DESCR and MESSAGE files.

Bump the PKGREVISIONs on the sj3* packages.