waitpid EINTR issue in varnishd

[Theo Schlossnagle]

On Solaris, I am occasionally seeing a sigchild due to the completion  
of the vcl compile that fires during the waitpid() call causing  
waitpid to -1 errno EINTR.  Here is a patch that addresses that  
condition.

--
Theo Schlossnagle
Esoteric Curio -- http://lethargy.org/
OmniTI Computer Consulting, Inc. -- http://omniti.com/

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