Added coccinelle rule to find strlcpy on NameData

NameData is a fixed-size type of 64 bytes. Using strlcpy to copy data
into a NameData struct can cause problems because any data that follows
the initial null-terminated string will also be part of the data.

coccinelle/namedata.cocci

@@ -0,0 +1,11 @@
+// NameData is a fixed-size type of 64 bytes. Using strlcpy to copy data into a
+// NameData struct can cause problems because any data that follows the initial
+// null-terminated string will also be part of the data.
+
+@rule_namedata_strlcpy@
+expression E1, E2;
+symbol NAMEDATALEN;
+@@
+- strlcpy(E1, E2, NAMEDATALEN);
++ /* You are using strlcpy with NAMEDATALEN, please consider using NameData and namestrcpy instead. */
++ namestrcpy(&E1, E2);