[check_postgres] perfdata format

[Greg Sabino Mullane]

> We found that your perfdata output format is not actually compliant with nagios
> format described here :
...
> Please, find in attachment a patch proposal.

Thanks very much, we'll include this in the next version.

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