patch: nrpe fails to start when config file includes whitespace-only line

[Simon Kitching]

Hi,

If nrpe's config file should include a line containing only whitespace,
then it will fail to start. I found this rather tricky to diagnose!

To demonstrate bug:
  nrpe -d -c {config-file}
then
  ps -efl | grep nrpe

For a config file containing "  \n", nrpe will fail to start.

So attached is a simple patch to ignore all whitespace on the start of
any line in the config file. Note that this means that "  x=foo" and " 
# a comment" will now be regarded as valid rather than invalid as was
previously done (leading whitespace is just ignored).

The patch is in conventional "universal diff" format.
Regards,

Simon

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