Add 'CH', 'HS', 'ANY' classes in addition to 'IN' and 'CHAOS'

Author: steve

ftdetect/bindzone.vim

@@ -1,5 +1,5 @@
 au BufNewFile,BufRead named.root		setf bindzone
-au BufNewFile,BufRead */named/*,*/bind/*,*.db	call s:BindzoneCheck('')
+au BufNewFile,BufRead */named/*,*/bind/*,*.db,db.*	call s:BindzoneCheck('')
 
 func! s:BindzoneCheck(default)
   if getline(1).getline(2).getline(3).getline(4) =~ '^; <<>> DiG [0-9.]\+ <<>>\|BIND.*named\|$ORIGIN\|$TTL\|IN\s\+SOA'