lighttpd include external.conf using file glob

lighttpd 1.4.40 and later support 'include' using file glob

(The prior code for compatibility was presumably for Debian Jessie
 and earlier, now obsolete.  Debian Stretch -- currently oldstable --
 ships with lighttpd 1.4.45)

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>

automated install/basic-install.sh

@@ -1412,10 +1412,6 @@ installConfigs() {
         fi
         # and copy in the config file Pi-hole needs
         install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/${LIGHTTPD_CFG} "${lighttpdConfig}"
-        # Make sure the external.conf file exists, as lighttpd v1.4.50 crashes without it
-        if [ ! -f /etc/lighttpd/external.conf ]; then
-            install -m 644 /dev/null /etc/lighttpd/external.conf
-        fi
         # If there is a custom block page in the html/pihole directory, replace 404 handler in lighttpd config
         if [[ -f "${PI_HOLE_404_DIR}/custom.php" ]]; then
             sed -i 's/^\(server\.error-handler-404\s*=\s*\).*$/\1"\/pihole\/custom\.php"/' "${lighttpdConfig}"