Open the routing socket before this pass to close a small window where
we would miss messages at startup (and get state kept by the scripts
out of sync).
Patch supplied by KOIE Hidetaka in private mail.
based interfaces. Note: all other interface types work the same as before,
and no names are hardcoded.
When a if_spppsubr.c based interface is marked IFF_UP, but has not yet
reached phase NETWORK (i.e. it didn't connect yet or authentication has not
yet completed) do not call the ip-up script for it on the initial pass
over all IFF_UP interfaces.
This fixes a race condition on startup when ip-up/ip-down are statefull
and need to be called pairwise (for example if ip-up adds and ip-down
removes a default route).
Monitors the routing socket for address changes of autonomous (kernel only)
interfaces (like PPPoE) and runs up/down scripts similar to what pppd
does for its interfaces.
