BUF_strdup() copies a null terminated string into a block of allocated
memory and returns a pointer to the allocated block.
-Unlike the standard C library strdup() this function uses Malloc() and so
+Unlike the standard C library strdup() this function uses OPENSSL_malloc() and so
should be used in preference to the standard library strdup() because it can
be used for memory leak checking or replacing the malloc() function.
-The memory allocated from BUF_strdup() should be freed up using the Free()
+The memory allocated from BUF_strdup() should be freed up using the OPENSSL_free()
function.
=head1 RETURN VALUES