lighttpd: use file glob for optional external.conf

lighttpd 1.4.50 config parse will error if include_shell exits non-zero
and pi-hole sample config: include_shell "cat external.conf 2>/dev/null"
is an error if external.conf does not exist

Replace with: include "external*.conf"
file glob supported since lighttpd 1.4.40 and is not an error if there
is no file which matches the file glob

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

advanced/lighttpd.conf.debian

@@ -72,4 +72,5 @@ $HTTP["url"] =~ "^/admin/\.(.*)" {
 }
 
 # Add user chosen options held in external file
-include_shell "cat external.conf 2>/dev/null"
+# (use file glob for optional file)
+include "external*.conf"

advanced/lighttpd.conf.fedora

@@ -90,4 +90,5 @@ $HTTP["url"] =~ "^/admin/\.(.*)" {
 }
 
 # Add user chosen options held in external file
-include_shell "cat external.conf 2>/dev/null"
+# (use file glob for optional file)
+include "external*.conf"