initskripts: networking: fix dhcpcd shutdown

with kernel 5.10 dhcpcd hung at shutdown if red was a wireless client
becuase there was two running instances. This change repeat the
dcpcd -k call.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

src/initscripts/networking/functions.network

@@ -138,6 +138,8 @@ dhcpcd_stop() {
 	# Wait until dhcpd has stopped.
 	while [ -d "/proc/${pid}" ]; do
 		sleep 1
+		# repeat stop if dhcp was still running
+		/sbin/dhcpcd ${dhcp_stop} ${device} &> /dev/null
 	done
 
 	# Display console message, depended on the exit code