bird/sysdep/cf

Available configuration variables:
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CONFIG_AUTO_ROUTES	Device routes are added automagically by the kernel
CONFIG_SELF_CONSCIOUS	We're able to recognize whether route was installed by us
CONFIG_MULTIPLE_TABLES	The kernel supports multiple routing tables
CONFIG_ALL_TABLES_AT_ONCE	Kernel scanner wants to process all tables at once
CONFIG_SINGLE_ROUTE	There is only one route per network

CONFIG_MC_PROPER_SRC	Multicast packets have source address according to socket saddr field
CONFIG_SKIP_MC_BIND	Don't call bind on multicast socket (def for *BSD)
CONFIG_NO_IFACE_BIND	Bind to iface is not available, use workarounds (def for *BSD)
CONFIG_UNIX_DONTROUTE	Use setsockopts DONTROUTE (undef for *BSD)
CONFIG_DONTROUTE_UNICAST Use MSG_DONTROUTE flag for unicast packets (def for FreeBSD)
CONFIG_USE_HDRINCL	Use IP_HDRINCL instead of control messages for source address on raw IP sockets.

CONFIG_RESTRICTED_PRIVILEGES	Implements restricted privileges using drop_uid()