[PATCH] Update external IP regularly

[grue]

in net.cpp:

Code:

void ThreadGetMyExternalIP(void* parg)
{
    // Wait for IRC to get it first
    if (GetBoolArg("-irc", false))
    {
        for (int i = 0; i < 2 * 60; i++)
        {
            Sleep(1000);
            if (fGotExternalIP)
                break;
        }
    }
	
	while(!fShutdown)
	{
		if (GetMyExternalIP(addrLocalHost))
		{
			printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
			if (addrLocalHost.IsRoutable())
			{
				// If we already connected to a few before we had our IP, go back and addr them.
				// setAddrKnown automatically filters any duplicate sends.
				CAddress addr(addrLocalHost);
				addr.nTime = GetAdjustedTime();
				{
					LOCK(cs_vNodes);
					BOOST_FOREACH(CNode* pnode, vNodes)
						pnode->PushAddress(addr);
				}
			}
		}
		Sleep(300000);
	}
}