pgsql: Make pg_dumplo schema-aware.

Log Message:
-----------
Make pg_dumplo schema-aware. Karel Zak

Modified Files:
--------------
pgsql/contrib/pg_dumplo:
lo_export.c (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_dumplo/lo_export.c.diff?r1=1.12&r2=1.13)
lo_import.c (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_dumplo/lo_import.c.diff?r1=1.10&r2=1.11)
main.c (r1.21 -> r1.22)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_dumplo/main.c.diff?r1=1.21&r2=1.22)
pg_dumplo.h (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_dumplo/pg_dumplo.h.diff?r1=1.10&r2=1.11)