* Correctly handle SSH failing to establish a connection. Because

this didn't work right, the build hook wouldn't fall back to using
  other machines of the desired type.

scripts/ssh.pm

@@ -25,14 +25,17 @@ sub openSSHConnection {
     # print "started" when it has established the connection, and wait
     # until we see that.
     open SSH, "ssh $sshHost @sshOpts -M -N -o LocalCommand='echo started' -o PermitLocalCommand=yes |" or die;
+
     while (<SSH>) {
         chomp;
-        last if /started/;
-    }
-    
+        if ($_ eq "started") {
             $sshStarted = 1;
             return 1;
         }
+    }
+
+    return 0;
+}
 
 # Tell the master SSH client to exit.
 sub closeSSHConnection {