add documentation for smartlist_join_strings

  return n;

}

/** Allocate and return a new string containing the concatenation of

 * the elements of <b>sl</b>, in order, separated by <b>join</b>.  If

 * <b>terminate</b> is true, also terminate the string with <b>join</b>.

 * Requires that every element of <b>sl</b> is NUL-terminated string.

 */

char *smartlist_join_strings(smartlist_t *sl, const char *join, int terminate)

{

  int i;