dns: don't use " for literal quotes

src/www/services_dnsmasq.php

@@ -404,8 +404,8 @@ $( document ).ready(function() {
                     " address as a DNS server to DHCP clients so they will use".
                     " the forwarder. The DNS forwarder will use the DNS servers".
                     " entered in %sSystem: General setup%s".
-                    " or those obtained via DHCP or PPP on WAN if the "Allow".
-                    " DNS server list to be overridden by DHCP/PPP on WAN"".
+                    " or those obtained via DHCP or PPP on WAN if the \"Allow".
+                    " DNS server list to be overridden by DHCP/PPP on WAN\"".
                     " is checked. If you don't use that option (or if you use".
                     " a static IP address on WAN), you must manually specify at".
                     " least one DNS server on the %sSystem: General setup%s page."),

src/www/services_unbound.php

@@ -315,10 +315,10 @@ include_once("head.inc");
                           <?= sprintf(gettext("If the DNS Resolver is enabled, the DHCP".
                           " service (if enabled) will automatically serve the LAN IP".
                           " address as a DNS server to DHCP clients so they will use".
-                          " the DNS Resolver. If Forwarding, is enabled, the DNS Resolver will use the DNS servers".
-                          " entered in %sSystem: General setup%s".
-                          " or those obtained via DHCP or PPP on WAN if the &quot;Allow".
-                          " DNS server list to be overridden by DHCP/PPP on WAN&quot;".
+                          " the DNS Resolver. If Forwarding, is enabled, the DNS Resolver".
+                          " will use the DNS servers entered in %sSystem: General setup%s".
+                          " or those obtained via DHCP or PPP on WAN if the \"Allow".
+                          " DNS server list to be overridden by DHCP/PPP on WAN\"".
                           " is checked."),'<a href="system_general.php">','</a>');?>
                         </td>
                       </tr>