Use root.hints from dns-root-data This patch enables loading DNS root server hints as offered by package dns-root-data (or using equivalent paths under /usr/local) if they are available. Otherwise the compiled-in defaults are used. . Setting BELLE_SIP_NO_SYS_ROOT_HINTS in the environment disables this feature. Setting BELLE_SIP_LOG_ROOT_HINTS in the environment logs the loaded root server definitions to stderr which can be used to reveal discrepancies. . The code is short and easy to understand, though not very efficient, but since it runs only once at start-up that should not matter much.
