Cleanups on the Logging branch.

1) Add a more reasonable max value for the the pedal/vswitch assign values.
2) Minor format change in format_ipv().
3) Formatting cleanup in push_message(). Also change debug messages to
   emphasize message direction.
4) Cleanup startup messages and add one that emits device name.
5) Cleanup the option message so that it's complete and readable.

gdigi.h

@@ -29,7 +29,7 @@ typedef enum {
     DEBUG_GROUP     = (1 << 3),     // Modifier group
     DEBUG_HEX       = (1 << 4),     // Dump message contents in hex.
     DEBUG_XML       = (1 << 5),     
-    DEBUG_VERBOSE   = (1 << 6),     
+    DEBUG_VERBOSE   = (1 << 6),
 } debug_flags_t;
 
 void debug_msg (debug_flags_t, char *fmt, ...);