Log Message:
-----------
Update to "actor" system to allow a third way besides "human actor" with pg_rolname or
software agent file/version (external username).
Modified Files:
--------------
aupg_src/sql:
audit_infrastructure.sql (r1.19 -> r1.20)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/aupg/aupg_src/sql/audit_infrastructure.sql?r1=1.19&r2=1.20)
audit_test_cds.sql (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/aupg/aupg_src/sql/audit_test_cds.sql?r1=1.7&r2=1.8)