irc: #bitcoin is overflowing. split up into 100 randomly-joined channels.

From laszlo

src/irc.cpp

@@ -340,8 +340,15 @@ void ThreadIRCSeed2(void* parg)
             }
         }
         
-        Send(hSocket, fTestNet ? "JOIN #bitcoinTEST\r" : "JOIN #bitcoin\r");
-        Send(hSocket, fTestNet ? "WHO #bitcoinTEST\r"  : "WHO #bitcoin\r");
+        if (fTestNet) {
+            Send(hSocket, "JOIN #bitcoinTEST\r");
+            Send(hSocket, "WHO #bitcoinTEST\r");
+        } else {
+            // randomly join #bitcoin00-#bitcoin99
+            int channel_number = GetRandInt(100);
+            Send(hSocket, strprintf("JOIN #bitcoin%02d\r", channel_number).c_str());
+            Send(hSocket, strprintf("WHO #bitcoin%02d\r", channel_number).c_str());
+        }
 
         int64 nStart = GetTime();
         string strLine;