title: use :tjump instead of :tag vim on pressing ctrl-]
body: <p>in vim,<br>
  when i press <code>ctrl-]</code></p>
  
  <p>1) the usual behavior:<br>
  it goes to the first matching tag with the word under the cursor,
  after that we need to do <code>:tjump</code> separately to see a list of all matching tags and then jump to the desired tag.</p>
  
  <p>2) what i want is:<br>
  vim should search the tag file,<br>
     if there are multiple matches, show me a list of all the matching tags<br>
     if there is one match, simply jump to the matching tag<br>
     (just like <code>:tjump</code> does)</p>
  
  <p>this behavior(2) already happens when we use <code>g-ctrl-]</code>, but i want it to happen with <code>ctrl-]</code><br>
  i have seen behavior(2) using <code>ctrl-]</code> in some vims in some linuses.</p>
  
  <p>please tell me how i can obtain behavior(2). in other words,<br>
  please tell me how i can make <code>ctrl-]</code> to behave like <code>g-ctrl-]</code> using <em>.vimrc</em> or whatever</p>