Correct CHANGES entry.

  *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and

     OPENSSL_asc2uni conditionally on Netware platforms to avoid a name

     clash.

     [Steve Henson]

     [Guenter <lists@gknw.net>]

  *) Don't check self signed certificate signatures in X509_verify_cert():

     it just wastes time without adding any security. As a useful side effect