patch 8.2.0873: a .jl file can be sawfish (lisp) or Julia

Problem:    A .jl file can be sawfish (lisp) or Julia.
Solution:   Do not recognize *.jl as lisp, since it might be Julia.
            (closes #6178)

src/testdir/test_filetype.vim

@@ -252,7 +252,7 @@ let s:filename_checks = {
     \ 'lilo': ['lilo.conf'],
     \ 'limits': ['/etc/limits', '/etc/anylimits.conf', '/etc/anylimits.d/file.conf'],
     \ 'liquid': ['file.liquid'],
-    \ 'lisp': ['sbclrc', '.sbclrc'],
+    \ 'lisp': ['file.lsp', 'file.lisp', 'file.el', 'file.cl', '.emacs', '.sawfishrc', 'sbclrc', '.sbclrc'],
     \ 'lite': ['file.lite', 'file.lt'],
     \ 'litestep': ['/LiteStep/any/file.rc'],
     \ 'loginaccess': ['/etc/login.access'],

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    873,
 /**/
     872,
 /**/