Disable lighttpd if found (#5835)

automated install/basic-install.sh

@@ -2300,6 +2300,39 @@ copy_to_install_log() {
     chown pihole:pihole "${installLogLoc}"
 }
 
+disableLighttpd() {
+    local response
+    # Detect if the terminal is interactive
+    if [[ -t 0 ]]; then
+        # The terminal is interactive
+        dialog --no-shadow --keep-tite \
+            --title "Pi-hole v6.0 no longer uses lighttpd" \
+           --yesno "\\n\\nPi-hole v6.0 has its own embedded web server so lighttpd is no longer needed *unless* you have custom configurations.\\n\\nIn this case, you can opt-out of disabling lighttpd and pihole-FTL will try to bind to an alternative port such as 8080.\\n\\nDo you want to disable lighttpd (recommended)?" "${r}" "${c}" && response=0 || response="$?"
+    else
+        # The terminal is non-interactive, assume yes. Lighttpd will be stopped
+        # but keeps being installed and can easily be re-enabled by the user
+        response=0
+    fi
+
+    # If the user does not want to disable lighttpd, return early
+    if [[ "${response}" -ne 0 ]]; then
+        return
+    fi
+
+    # Lighttpd is not needed anymore, so disable it
+    # We keep all the configuration files in place, so the user can re-enable it
+    # if needed
+
+    # Check if lighttpd is installed
+    if is_command lighttpd; then
+        # Stop the lighttpd service
+        stop_service lighttpd
+
+        # Disable the lighttpd service
+        disable_service lighttpd
+    fi
+}
+
 migrate_dnsmasq_configs() {
     # Previously, Pi-hole created a number of files in /etc/dnsmasq.d
     # During migration, their content is copied into the new single source of
@@ -2503,6 +2536,9 @@ main() {
     # but before starting or resttarting the ftl service
     disable_resolved_stublistener
 
+    # Disable lighttpd server
+    disableLighttpd
+
     # Check if gravity database needs to be upgraded. If so, do it without rebuilding
     # gravity altogether. This may be a very long running task needlessly blocking
     # the update process.