patch 9.1.0354: runtime(uci): No support for uci file types

Problem:  runtime(uci): No support for uci file types
          (Wu, Zhenyu)
Solution: include basic uci ftplugin and syntax plugins
          (Colin Caine)

closes: #14575

Co-authored-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Colin Caine <complaints@cmcaine.co.uk>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_filetype.vim

@@ -2441,4 +2441,26 @@ func Test_def_file()
   filetype off
 endfunc
 
+func Test_uci_file()
+  filetype on
+
+  call mkdir('any/etc/config', 'pR')
+  call writefile(['config firewall'], 'any/etc/config/firewall', 'D')
+  split any/etc/config/firewall
+  call assert_equal('uci', &filetype)
+  bwipe!
+
+  call writefile(['# config for nginx here'], 'any/etc/config/firewall', 'D')
+  split any/etc/config/firewall
+  call assert_notequal('uci', &filetype)
+  bwipe!
+
+  call writefile(['# Copyright Cool Cats 1997', 'config firewall'], 'any/etc/config/firewall', 'D')
+  split any/etc/config/firewall
+  call assert_equal('uci', &filetype)
+  bwipe!
+
+  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 */
+/**/
+    354,
 /**/
     353,
 /**/