[check_postgres] bug in txn_wraparound perfdata output

[Greg Sabino Mullane]

> I suggest to add the doc too (as for backend):
> 
>     Be careful when using filtering: an inclusion rule on the database name, for
>     example, may report no problems not only because the matching database
>     had no backends, but because you misspelled the name of the database!

This is in the Basic Filtering section already, not in the backends section.

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

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