put a 15-second timeout in asking icanhazip.com for our IP address, although...

put a 15-second timeout in asking icanhazip.com for our IP address, although this limit does not seem to actually work (i.e. if I set the limit to 5 seconds, curl still hangs 10+ when I turn off my network connection)

setup/functions.sh

@@ -92,7 +92,7 @@ function get_publicip_from_web_service {
 	#
 	# Pass '4' or '6' as an argument to this function to specify
 	# what type of address to get (IPv4, IPv6).
-	curl -$1 --fail --silent icanhazip.com 2>/dev/null
+	curl -$1 --fail --silent --max-time 15 icanhazip.com 2>/dev/null
 }
 
 function get_default_privateip {