Add support for SETUP_FILE

org/testdata/misc.html

@@ -43,6 +43,7 @@ src block
 </p>
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+#+SETUP_FILE: setup_file_org
 * Simple Headline [1/2]
 - [X] checked
 - [ ] unchecked
@@ -63,6 +64,10 @@ Still outside the drawer
 This is inside the drawer
 :END:
 Still outside the drawer
+* CUSTOM headline with custom status
+it&#39;s possible to use =#+SETUP_FILE= - in this case the setup file contains the following
+
+#+INCLUDE: &#34;setup_file_org&#34; src org
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