Regex & case fix

grep & sed regexes  match commented or uncommented

Signed-off-by: Rob Gill <rrobgill@protonmail.com>

automated install/basic-install.sh

@@ -1269,16 +1269,16 @@ check_service_active() {
 # Resolved needs to remain in place for installer to download needed files
 # so this change needs to be made after installation is complete, but before resarting dnsmasq/ftl
 disable_resolved_stublistener() {
-  # Check if Systemd-resolved's DNSSTub listener is enabled and active on port 53
+  # Check if Systemd-resolved's DNSStubListener is enabled and active on port 53
   if check_service_active "systemd-resolved"; then
     # Check if DNSStubListener is enabled
-    if ( grep '#DNSStubListener=yes' /etc/systemd/resolved.conf &> /dev/null ); then
+    if ( grep -E '#?DNSStubListener=yes' /etc/systemd/resolved.conf &> /dev/null ); then
       # Disable the DNSStubListener to unbind it from port 53
       # Note that this breaks dns functionality on host until dnsmasq/ftl are up and running
       echo -e "Disabling systemd-resolved DNSStubListener"
       # Make a backup of the original /etc/systemd/resolved.conf
       # (This will need to be restored on uninstallation)
-      sed -i.orig 's/#DNSStubListener=yes/DNSStubListener=no/g' /etc/systemd/resolved.conf
+      sed -r -i.orig 's/#?DNSStubListener=yes/DNSStubListener=no/g' /etc/systemd/resolved.conf
       systemctl restart systemd-resolved
     fi
   fi