Add license pointer

config.def.h

@@ -1,3 +1,4 @@
+/* See LICENSE file for copyright and license details. */
 #define CWD "cwd: "
 #define CURSR " > "
 #define EMPTY "   "

noice.c

@@ -1,3 +1,4 @@
+/* See LICENSE file for copyright and license details. */
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>

util.h

@@ -1,3 +1,4 @@
+/* See LICENSE file for copyright and license details. */
 #undef strlcat
 size_t strlcat(char *, const char *, size_t);
 #undef strlcpy