Merge pull request #1288 from jasonlyc/bug_fix

fix syntax error in firerouter_dhcpcd_update_rt script due to dash shell

scripts/firerouter_dhcpcd_update_rt

@@ -22,9 +22,8 @@ case $reason in
       var_name="nd1_addr$addr_id"
       prefix_length_var_name="nd1_prefix_information${addr_id}_length"
       eval "prefix_length=\$$prefix_length_var_name"
-      echo "haha $prefix_length"
       eval "addr=\$$var_name"
-      if [ -n "$addr" && $prefix_length -ge 64 ]; then
+      if [ -n "$addr" ] && [ $prefix_length -ge 64 ]; then
         new_addrs="$new_addrs$addr,"
         for rt_table in $rt_tables; do
           sudo ip -6 r add $addr dev $interface metric $metric mtu $mtu table $rt_table