patch 9.1.0536: filetype: zone files are not recognized

Problem:  filetype: zone files are not recognized
          (rpdprd)
Solution: Detect '*.zone' files as bindzone filetype

fixes: #14222

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index c814baa..ba22ad4 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -256,6 +256,7 @@
 
 " BIND zone
 au BufNewFile,BufRead named.root		setf bindzone
+au BufNewFile,BufRead *.zone			setf bindzone
 au BufNewFile,BufRead *.db			call dist#ft#BindzoneCheck('')
 
 " Blade
diff --git a/runtime/ftplugin/bindzone.vim b/runtime/ftplugin/bindzone.vim
new file mode 100644
index 0000000..f9e5f4b
--- /dev/null
+++ b/runtime/ftplugin/bindzone.vim
@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language:	bind zone file
+" Maintainer:	This runtime file is looking for a new maintainer.
+" Last Change:	2024 Jul 06
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin=1
+
+setlocal comments=b:;
+setlocal commentstring=;\ %s
+setlocal formatoptions-=t
+setlocal formatoptions+=crq
+
+let b:undo_ftplugin = "setlocal com< cms< fo<"