added automatic latest firmware spoofing (#16)

Reviewed-on: #16

src/state.h

@@ -10,6 +10,7 @@ typedef struct {
     char  authkey[64];
     char  inform_url[256];
     char  cfgversion[32];
+    char  firmware_version[64];
     bool  config_applied;
     int   config_schema;
     bool  use_aes_gcm;