ADD: "hf legic wipe" - it autodetects tagtype and fills all bytes from offset 7 to end with zeros.

Fills a legic tag memory with zeros. From byte7 and to the end.
 Usage:  hf legic wipe [h]
Options:
      h             : this help

Samples:
      hf legic wipe

client/cmdhflegic.h

@@ -54,5 +54,5 @@ int usage_legic_reader(void);
 int usage_legic_info(void);
 int usage_legic_dump(void);
 int usage_legic_restore(void);
-
+int usage_legic_wipe(void);
 #endif