2005-10-21 Paul Jakma <paul.jakma@sun.com>

	* (general) OSPF fast, sub-second hello and 1s dead-interval
	  support. A warning fix. Millisec support for ospf_timer_dump.
	  Change auto-cost ref-bandwidth to add a comment to write out
	  of config, rather than printing annoying messages to vty on
	  startup.
	* ospf_dump.c: (ospf_timer_dump) Print out milliseconds too.
	  Callers typically specify a length of 9, so most see
	  millisecs unless they specify the additional length.
	* ospf_interface.h: (struct ospf_interface) new interface param,
	  fast_hello.
	* ospf_interface.c: (ospf_if_table_lookup) add brackets,
	  gcc warning fix.
	  (ospf_new_if_params) Initialise fast_hello param.
	  (ospf_free_if_params) Check whether fast_hello is configured.
	  (ospf_if_new_hook) set fast_hello to default.
	* ospf_ism.h: Wrap OSPF_ISM_TIMER_ON inside do {} while (0) to
	  prevent funny side-effects from its if statement when this
	  macro is used conditionally by other macros.
	  (OSPF_ISM_TIMER_MSEC_ON) new macro, set in milliseconds.
	  (OSPF_HELLO_TIMER_ON) new macro to set hello timer according
	  to whether fast_hello is set.
	* ospf_ism.c: Update all setting of the hello timer to use
	  either OSPF_ISM_TIMER_MSEC_ON or OSPF_HELLO_TIMER_ON. The
	  former is used when hello is to be sent immediately.
	* ospf_nsm.c: ditto
	* ospf_packet.c: (ospf_hello) hello-interval is not checked
	  for mismatch if fast_hello is set.
	  (ospf_read) Annoying nit, fix "no ospf_interface" to be debug
	  rather than a warning, as it can be perfectly normal to
	  receive packets when logical subnets are used.
	  (ospf_make_hello) Set hello-interval to 0 if fast-hellos are
	  configured.
	* ospf_vty.c: (ospf_auto_cost_reference_bandwidth) annoying
	  nit, don't vty_out if this command is given, it gets tired
	  quick.
	  (show_ip_ospf_interface_sub) Print the hello-interval
	  according to whether fast-hello is set or not.
	  Print the extra 5 millisec characters from (ospf_timer_dump)
	  if fast-hello is configured.
	  (ospf_vty_dead_interval_set) new function, common to all
	  forms of dead-interval command, to set dead-interval and
	  fast-hello correctly. If a dead-interval is given, unset
	  fast-hello, else if a hello-multiplier is set, set
          dead-interval to 1 and fast-hello to given multiplier.
	  (ip_ospf_dead_interval_addr_cmd) use
	  ospf_vty_dead_interval_set().
	  (ip_ospf_dead_interval_minimal_addr_cmd) ditto.
	  (no_ip_ospf_dead_interval) Unset fast-hello.
	  (no_ip_ospf_hello_interval) Bug-fix, unset of hello-interval
	  should set it to OSPF_HELLO_INTERVAL_DEFAULT, not
	  OSPF_ROUTER_DEAD_INTERVAL_DEFAULT.
	  (config_write_interface) Write out fast-hello.
	  (ospf_config_write) Write a comment about
	  "auto-cost reference-bandwidth" having to be equal on all
	  routers. Hopefully just as noticeable as old practice of
	  writing to vty, but less annoying.
	  (ospf_vty_if_init) install the two new dead-interval
	  commands.
	* ospfd.h: Add defines for OSPF_ROUTER_DEAD_INTERVAL_MINIMAL
	  and OSPF_FAST_HELLO_DEFAULT.

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