Remove headers.h

src/strlcpy.h

@@ -15,6 +15,10 @@
  */
 #ifndef BITCOIN_STRLCPY_H
 #define BITCOIN_STRLCPY_H
+
+#include <stdlib.h>
+#include <string.h>
+
 /*
  * Copy src to string dst of size siz.  At most siz-1 characters
  * will be copied.  Always NUL terminates (unless siz == 0).