title: ERROR: permission denied for language c
body: <p>When creating a function like this with a non-super user I am getting the error below:</p>
  
  <p><code>ERROR: permission denied for language c
  SQL state: 42501</code></p>
  
  <p>The function created is :</p>
  
  <pre><code>CREATE OR REPLACE FUNCTION dblink_connect (text)
  RETURNS text
  AS '$libdir/dblink','dblink_connect'
  LANGUAGE C STRICT;
  </code></pre>
  
  <p>But if I wanted to give permission on language C to my non-super user, I am getting the error below:
  <code>postgres=# grant usage on language c to caixa;
  ERROR:  language "c" is not trusted</code></p>
  
  <p>That means, non-super user can't create function with language C? or is there anything else I am doing wrong?</p>