pgsql: Convert newlines to spaces in names written in pg_dump comments.

Convert newlines to spaces in names written in pg_dump comments.

pg_dump was incautious about sanitizing object names that are emitted
within SQL comments in its output script.  A name containing a newline
would at least render the script syntactically incorrect.  Maliciously
crafted object names could present a SQL injection risk when the script
is reloaded.

Reported by Heikki Linnakangas, patch by Robert Haas

Security: CVE-2012-0868

Branch
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REL8_3_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/a7f6cb85486b1f3eacd86155af2fdc20a1dc2bec

Modified Files
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src/bin/pg_dump/pg_backup_archiver.c |   60 +++++++++++++++++++++++++++++++--
1 files changed, 56 insertions(+), 4 deletions(-)