[app][inetsrv] add tftp server.

app/inetsrv/inetsrv.c

Index: app/inetsrv/inetsrv.c
diff --git a/app/inetsrv/inetsrv.c b/app/inetsrv/inetsrv.c
index 63a64e9f643e3a880083bf946ad6bab3e4ea87c9..11d412b51f7c715a9a33f9b49db53232823f54b9 100644
--- a/app/inetsrv/inetsrv.c
+++ b/app/inetsrv/inetsrv.c
@@ -29,6 +29,7 @@
 #include <compiler.h>
 #include <kernel/thread.h>
 #include <lib/minip.h>
+#include <lib/tftp.h>
 #include <lib/cksum.h>
 #include <platform.h>
 
@@ -227,6 +228,7 @@ static void inetsrv_entry(const struct app_descriptor *app, void *args)
     thread_detach_and_resume(thread_create("chargen", &chargen_server, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE));
     thread_detach_and_resume(thread_create("discard", &discard_server, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE));
     thread_detach_and_resume(thread_create("echo", &echo_server, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE));
+    tftp_server_init(NULL);
 }
 
 APP_START(inetsrv)