Use the following coccinelle script to change uses of
smartlist_add(sl, tor_strdup(str)) to
smartlist_add_strdup(sl, string) (coccinelle script from nickm
via bug 20048):

@@
expression a;
expression b;
@@
- smartlist_add
+ smartlist_add_strdup
   (a,
- tor_strdup(
   b
- )
  )