[check_postgres] Allow dots and dashes in database names in function check_backends

[Greg Sabino Mullane]

>       SLURP: while ($db->{slurp} =~ /(\d+) \| (\d+)\s+\|\s+([\w\-\.]+)\s*/gsm) {

Applied, thank you!

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

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