Add minimal support for ipmitool

Adding just a couple of ipmi commands that ipmitool always calls.
I'm doing this because in order to run the ipmitool lan 1 <parms>
instead of just the raw command the get channel info was needed.
diff --git a/apphandler.h b/apphandler.h
index aa2a55d..a17ee7f 100644
--- a/apphandler.h
+++ b/apphandler.h
@@ -27,6 +27,8 @@
     IPMI_CMD_GET_MSG_FLAGS          = 0x31,
     IPMI_CMD_READ_EVENT             = 0x35,
     IPMI_CMD_GET_CAP_BIT            = 0x36,
+    IPMI_CMD_GET_CHAN_INFO          = 0x42,
+
 };
 
 // A Mechanism to tell host to shtudown hosts by sending this PEM SEL. Really