Use conf for /etc/hosts, fixes #595

ftdetect/polyglot.vim

@@ -2545,7 +2545,7 @@ if !has_key(s:disabled_packages, 'alsaconf')
 endif
 
 if !has_key(s:disabled_packages, 'conf')
-  au BufNewFile,BufRead *.conf,auto.master,config setf conf
+  au BufNewFile,BufRead *.conf,*/etc/hosts,auto.master,config setf conf
 endif
 
 if !has_key(s:disabled_packages, 'master')

packages.yaml

@@ -1958,6 +1958,7 @@ filetypes:
   filenames:
   - auto.master
   - config
+  - '*/etc/hosts'
 ---
 name: b
 remote: vim/vim:runtime