diff -up vim80/runtime/filetype.vim.bindsyntax vim80/runtime/filetype.vim
--- vim80/runtime/filetype.vim.bindsyntax	2017-03-27 16:51:42.863820018 +0200
+++ vim80/runtime/filetype.vim	2017-03-27 17:04:41.264496625 +0200
@@ -288,7 +288,7 @@ au BufNewFile,BufRead *.bib			setf bib
 au BufNewFile,BufRead *.bst			setf bst
 
 " BIND configuration
-au BufNewFile,BufRead named.conf,rndc.conf	setf named
+au BufNewFile,BufRead named*.conf,rndc*.conf,rndc*.key	setf named
 
 " BIND zone
 au BufNewFile,BufRead named.root		setf bindzone