unbound: replace obsolete test expressions

Expressions '-o', '-a', and '\( \)' within test or '[ ]' are obsolete.
POSIX allows few arguments to test, so long expressions are not
portable. '[ p -a q ]' can be replaced with '[ p ] && [ q ]' instead.

Signed-off-by: Eric Luehrsen <ericluehrsen@gmail.com>

net/unbound/files/iptools.sh

@@ -130,7 +130,7 @@ valid_subnet_any() {
   local validip6=$( valid_subnet6 $subnet )
 
 
-  if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
+  if [ "$validip4" = "ok" ] || [ "$validip6" = "ok" ] ; then
     echo "ok"
   else
     echo "not"