[check_postgres] Patch for multi-slony status check

[Greg Sabino Mullane]

> I had 2 solutions: support both options or renaming back 
> --search_path as --schema.

Sorry for such a long delay! I just committed a version of this. 
Rather than set a search_path, we simply call the SQL once for each 
schema as needed. Thus, the original examples you gave should work.

-- 
Greg Sabino Mullane greg at endpoint.com
End Point Corporation
PGP Key: 0x14964AC8
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