pgsql: Add --section option to pg_dump and pg_restore.

Add --section option to pg_dump and pg_restore.

Valid values are --pre-data, data and post-data. The option can be
given more than once. --schema-only is equivalent to
--section=pre-data --section=post-data. --data-only is equivalent
to --section=data.

Andrew Dunstan, reviewed by Joachim Wieland and Josh Berkus.

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/a4cd6abcc901c1a8009c62a27f78696717bb8fe1

Modified Files
--------------
doc/src/sgml/ref/pg_dump.sgml        |   24 ++++++++++++++--
doc/src/sgml/ref/pg_restore.sgml     |   23 ++++++++++++++++
src/bin/pg_dump/common.c             |    2 +-
src/bin/pg_dump/dumputils.c          |   30 ++++++++++++++++++++
src/bin/pg_dump/dumputils.h          |    1 +
src/bin/pg_dump/pg_backup.h          |    9 ++++++
src/bin/pg_dump/pg_backup_archiver.c |   19 +++++++++++++
src/bin/pg_dump/pg_backup_archiver.h |    3 ++
src/bin/pg_dump/pg_dump.c            |   49 ++++++++++++++++++++++++++++++++-
src/bin/pg_dump/pg_restore.c         |   30 ++++++++++++++++++++
10 files changed, 184 insertions(+), 6 deletions(-)