NSH networking: There is now a configuration option that will bring up the network on an separate thread. Since the network bring-up is asynchronous, there are not serial console start-up delays due to the network negotiation time.

nshlib/nsh.h

@@ -104,7 +104,9 @@
 #  define CONFIG_NSH_TMPDIR "/tmp"
 #endif
 
-/* Networking support */
+/* Networking support.  Make sure that all non-boolean configuration
+ * settings have some value.
+ */
 
 #ifndef CONFIG_NSH_IPADDR
 #  define CONFIG_NSH_IPADDR    0x0a000002
@@ -126,6 +128,14 @@
 #  define CONFIG_NSH_MACADDR   0x00e0deadbeef
 #endif
 
+#ifndef CONFIG_NSH_NETINIT_THREAD_STACKSIZE
+#  define CONFIG_NSH_NETINIT_THREAD_STACKSIZE 1568
+#endif
+
+#ifndef CONFIG_NSH_NETINIT_THREAD_PRIORITY
+#  define CONFIG_NSH_NETINIT_THREAD_PRIORITY   100
+#endif
+
 #ifndef CONFIG_NET
 #  undef CONFIG_NSH_ARCHMAC
 #endif