title: Emacs -nw with sql-mode does not ask password on minibuffer
body: <p><img src="https://i.stack.imgur.com/jmd5z.png" alt="enter image description here"></p>
  
  <p>I'm using emacs on a console (emacs -nw). I use sql-mode, and when connecting to postgresql, it asks me to enter a password on a buffer, where password is visible.</p>
  
  <p>If I customize-group and set the password option in sql-postgre-login-params list, it asks for password on the minibuffer, but also asks for password on a buffer.</p>
  
  <p>How can customize sql-mode to get asked for password only on the minibuffer?</p>
  
  <p>Thanks in advance.</p>
  
  <p>Edit: the Emacs version: GNU Emacs 24.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)</p>