title: Muting 'starting worker' message from foreach in ROUT file
body: <p>My code currently looks like this</p>
  <pre><code>results= foreach(i=seq(1,n),.combine='c') %dopar% {
                 require('Matrix',quietly=TRUE)
                 start_time=Sys.time()
                 Q[i]=some_function(1,2,3)
                 end_time=Sys.time()
                 print(end_time-start_time)
     }
  </code></pre>
  <p>where I am calculating something in parallel and want to be able to print to the ROUT file inside each parallel process. The problem is my ROUT file is filled with the following</p>
  <pre><code>starting worker pid=82688 on localhost:11668 at 10:57:10.347
  starting worker pid=82672 on localhost:11668 at 10:57:10.347
  starting worker pid=82677 on localhost:11668 at 10:57:10.347
  starting worker pid=82680 on localhost:11668 at 10:57:10.347
  starting worker pid=82669 on localhost:11668 at 10:57:10.346
  </code></pre>
  <p>Since my code involves me calling foreach multiple times this makes it very difficult to parse through the ROUT file</p>
  <p>Is there a way to mute the &quot;starting worker pid=...&quot; lines from an R outfile in the <code>foreach</code> package?</p>