[daemon startup] Add --dry-run/-C argument to daemons, to check config file syntax

[daemon startup] Add --dry-run/-C argument to daemons, to check config file syntax

2006-10-04 Oliver Hookins <ohookins@gmail.com>

	* bgpd/bgp_main.c: Add configuration check option, with
	'-C' rather than '-c' for consistency between daemons.
	* isisd/isis_main.c: ditto
	* ospf6d/ospf6_main.c: ditto
	* ospfd/ospf_main.c: ditto
	* ripngd/ripng_main.c: ditto
	* vtysh/vtysh_main.c: ditto
	* ripd/rip_main.c: Change the config check option to
	'-C' and tidy up the code.
	* zebra/main.c: ditto

2006-10-04 Stergiakis Alexandros <astergiakis@antcor.com>

	* ripd/rip_main.c: This trivial patch introduces a new
	  command-line option '-c', which instructs zebra/ripd
	  to check its configuration file for validity,	print
	  any error message, and then exit. This is useful when
	  the configuration file is edited by hand or otherwise,
	  and you simply want to validate it without any other
	  effect.
	* zebra/main.c: ditto