[RFC] Use noafif in dhcpif and sycndhcpif

[Xin LI]

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Hi,

While developing FreeNAS we have hit a problem -- when
ifconfig_DEFAULT is set to "DHCP", all interfaces including pfsync0
and pflog0 would be probed by dhclient.

It seems to be reasonable to check noafif in both dhcpif and
syncdhcpif, as did in ipv6_autoconfif based on same reasoning.

Comments?

Cheers,
- -- 
Xin LI <delphij at delphij.net>	https://www.delphij.net/
FreeBSD - The Power to Serve!		Live free or die
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-------------- next part --------------
Index: etc/network.subr
===================================================================
--- etc/network.subr	(revision 225709)
+++ etc/network.subr	(working copy)
@@ -297,6 +297,10 @@ dhcpif()
 	local _tmpargs _arg
 	_tmpargs=`_ifconfig_getargs $1`
 
+	if noafif $1; then
+		return 1
+	fi
+
 	for _arg in $_tmpargs; do
 		case $_arg in
 		[Dd][Hh][Cc][Pp])
@@ -322,6 +326,10 @@ syncdhcpif()
 	local _tmpargs _arg
 	_tmpargs=`_ifconfig_getargs $1`
 
+	if noafif $1; then
+		return 1
+	fi
+
 	for _arg in $_tmpargs; do
 		case $_arg in
 		[Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])