spawn/NamespaceOptions: remove obsolete PR_SET_DUMPABLE workaround
spawn/NamespaceOptions: remove obsolete PR_SET_DUMPABLE workaround

libdaemon does this for us since version 0.4.1.

CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy