Updated faq (markdown)

faq.md

@@ -44,7 +44,29 @@ page](https://github.com/junegunn/vim-plug/wiki/ruby).
 ### Shouldn't vim-plug update itself on `PlugUpdate` like Vundle?
 
 There is a separate `:PlugUpgrade` command and there are valid reasons behind the decision.
-A detailed discussion can be found [here](https://github.com/junegunn/vim-plug/issues/69).
+A detailed discussion can be found [here](https://github.com/junegunn/vim-plug/pull/240).
+
+If you really want to use `PlugUpdate` instead of `PlugUpgrade` you can set up vim-plug like follows:
+
+```sh
+" Manually clone vim-plug and symlink plug.vim to ~/.vim/autoload
+mkdir -p ~/.vim/{autoload,plugged}
+git clone https://github.com/junegunn/vim-plug.git ~/.vim/plugged/
+ln -s ~/.vim/plugged/vim-plug/plug.vim ~/.vim/autoload
+```
+
+and in your .vimrc:
+
+```vim
+call plug#begin('~/.vim/plugged')
+Plug 'junegunn/vim-plug'
+" ...
+call plug#end()
+" The caveat is that you should *never* use PlugUpgrade
+delc PlugUpgrade
+```
+
+Unlike `:PlugUpgrade`, you'll have to restart Vim after vim-plug is updated.
 
 ### Automatic installation