[package] firewall (#7355)

- partially revert r21486, start firewall on init again
	- skip iface hotplug events if base fw is not up yet
	- get ifname and up state with uci_get_state() in iface setup
	  since the values gathered by scan_interfaces() may be outdated
	  when iface coldplugging happens (observed with pptp)
	- ignore up state when bringing down interfaces because ifdown
	  reverts state vars before dispatching the iface event
	- bump package revision


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21502 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/firewall/files/lib/core.sh

@@ -15,8 +15,6 @@ fw_start() {
 		exit 1
 	}
 
-	lock /var/lock/firewall.start
-
 	uci_set_state firewall core "" firewall_state
 
 	fw_clear DROP
@@ -52,8 +50,6 @@ fw_start() {
 	fw_callback post core
 
 	uci_set_state firewall core loaded 1
-
-	lock -u /var/lock/firewall.start
 }
 
 fw_stop() {
@@ -94,7 +90,6 @@ fw_die() {
 	echo "Error:" "$@" >&2
 	fw_log error "$@"
 	fw_stop
-	lock -u /var/lock/firewall.start
 	exit 1
 }