Limit curl execution time to 2s to find WAN IP

Option "--connect-timeout" used to determine external IP covers only
connection phase. Curl may "hans" in a different phase and this makes
login to the system impossible if MOTD "header" module enabled.

Using "--max-time" is more reliable and prevents hanging for hours.

Fixes issue #7753

Signed-off-by: Uladzimir Bely <wiselord1983@gmail.com>

packages/bsp/common/etc/update-motd.d/10-armbian-header

@@ -56,7 +56,7 @@ for f in $MOTD_DISABLE; do
 done
 
 function get_wan_address() {
-	curl --connect-timeout 2 -s http://whatismyip.akamai.com/
+	curl --max-time 2 -s http://whatismyip.akamai.com/
 } # get wan ip address
 
 function get_ip_addresses() {