title: Set sslmode=allow with pg_dump
body: <p>I need to specify <code>sslmode=allow</code> when using psql to connect to my PostgreSQL DB, like: <code>psql sslmode=allow -h localhost -p 5432</code>
  otherwise I get <code>server does not support SSL, but SSL was required</code></p>
  
  <p>I tried specifying the same option to <code>pg_dump</code> but it doesn't recognize the option.</p>
  
  <p>How do I specify <code>sslmode</code> to <code>pg_dump</code>?</p>