Add FreeBSD support for peer process identification#25
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SO_PEERCRED is not available on FreeBSD. Instead it uses LOCAL_PEERCRED with struct xucred to obtain socket peer credentials.
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This PR enables
CServerClientto correctly retrieve the peer's PID on FreeBSD.SO_PEERCREDis not available on FreeBSD. Instead, it usesLOCAL_PEERCREDwithstruct xucredto obtain socket peer credentials. The changes include:<sys/ucred.h>and<sys/un.h>)LOCAL_PEERCREDcr_pidtom_pidAlso this PR adds a missing include in
tests/Fork.cpp.