patch 9.1.0950: filetype: fennelrc files are not recognized

Problem:  filetype: fennelrc files are not recognized
Solution: detect 'fennelrc' files as fennel filetype
          (Wu Zhenyu)

References:
https://github.com/bakpakin/Fennel/issues/193

closes: #16262

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -844,7 +844,7 @@ au BufNewFile,BufRead *.fan,*.fwt		setf fan
 au BufNewFile,BufRead *.factor			setf factor
 
 " Fennel
-autocmd BufRead,BufNewFile *.fnl		setf fennel
+autocmd BufRead,BufNewFile *.fnl,{,.}fennelrc	setf fennel
 
 " Fetchmail RC file
 au BufNewFile,BufRead .fetchmailrc		setf fetchmail

src/testdir/test_filetype.vim

@@ -273,7 +273,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     falcon: ['file.fal'],
     fan: ['file.fan', 'file.fwt'],
     faust: ['file.dsp', 'file.lib'],
-    fennel: ['file.fnl'],
+    fennel: ['file.fnl', '.fennelrc', 'fennelrc'],
     fetchmail: ['.fetchmailrc'],
     fgl: ['file.4gl', 'file.4gh', 'file.m4gl'],
     firrtl: ['file.fir'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    950,
 /**/
     949,
 /**/