Ensure existing files are proper owner and mode.

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>
co-authored-by: RD WebDesign <github@rdwebdesign.com.br>

automated install/basic-install.sh

@@ -1129,7 +1129,8 @@ chooseBlocklists() {
     done
     # Create an empty adList file with appropriate permissions.
     if [ ! -f "${adlistFile}" ]; then
-        install /dev/null "${adlistFile}"
+        install -m 644 /dev/null "${adlistFile}"
+    else
         chmod 644 "${adlistFile}"
     fi
 }
@@ -1333,7 +1334,7 @@ installConfigs() {
         install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/${LIGHTTPD_CFG} "${lighttpdConfig}"
         # Make sure the external.conf file exists, as lighttpd v1.4.50 crashes without it
         if [ ! -f /etc/lighttpd/external.conf ]; then
-            install -m 644 /dev/null /etc/lighttpd/external.com
+            install -m 644 /dev/null /etc/lighttpd/external.conf
         fi
         # If there is a custom block page in the html/pihole directory, replace 404 handler in lighttpd config
         if [[ -f "${PI_HOLE_BLOCKPAGE_DIR}/custom.php" ]]; then