The attached patch enables to assign security labels on shared database object
types (database, tablespace, role).
As pg_description stuff doing, it adds a new pg_shseclabel catalog to store related
labels. Its internal APIs are kept. If and when (Get|Set|Delete)SecurityLabel is
invoked for the shared catalogs, it references the pg_shseclabel instead of the
pg_seclabel.
This patch also contains pg_dump support, actual use cases (contrib/sepgsql),
regression tests and updates of sgml documentation.
Thanks,
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NEC Europe Ltd, SAP Global Competence Center
KaiGai Kohei <kohei.kaigai@eu.nec.com>