Update sed command for getting vlan_id from cmdline:

This fixes an issue where "vlan_id" is a substring.
For example: "thisisavlan_id=123". This example will
be treated as if the vlan_id was not set at all.

Signed-off-by: Jacob Weinstock <jakobweinstock@gmail.com>

files/dhcp.sh

@@ -11,7 +11,7 @@ run_dhcp_client() {
 	one_shot="$1"
 	al="eth*"
 
-	vlan_id=$(sed -n 's/.*vlan_id=\([0-9]*\).*/\1/p' /proc/cmdline)
+	vlan_id=$(sed -n 's/.* vlan_id=\([0-9]*\).*/\1/p' /proc/cmdline)
 	if [ -n "$vlan_id" ]; then
 		al="eth*.*"
 	fi