title: Concat integers as binary strings to bytea
body: <p>is it possible in PostgreSQL 8.4 to concat multiple integers (<code>int4</code>) values to a bytea value?</p>
  
  <p>For example:</p>
  
  <pre><code>5::int4 || 1::int4
  </code></pre>
  
  <p>should result in a bytea value with <code>(0x05 0x00 0x00 0x00 0x01 0x00 0x00 0x00)</code>, assuming a little endian machine.</p>