patch 9.1.0865: filetype: org files are not recognized

Problem:  filetype: org files are not recognized
Solution: detect '*.org' files as 'org' filetype,
          include filetype and syntax plugin
          (Luca Saccarola)

closes: #16054

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_filetype.vim

@@ -2724,4 +2724,14 @@ func Test_make_file()
   filetype off
 endfunc
 
+func Test_org_file()
+  filetype on
+
+  call writefile(['* org Headline', '*some bold text*', '/some italic text/'], 'Xfile.org', 'D')
+  split Xfile.org
+  call assert_equal('org', &filetype)
+
+  filetype off
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    865,
 /**/
     864,
 /**/