Update to openssl-0.9.8k.

Changes between 0.9.8j and 0.9.8k  [25 Mar 2009]
*) Don't set val to NULL when freeing up structures, it is freed up by
  underlying code. If sizeof(void *) > sizeof(long) this can result in
  zeroing past the valid field. (CVE-2009-0789)
*) Fix bug where return value of CMS_SignerInfo_verify_content() was not
  checked correctly. This would allow some invalid signed attributes to
  appear to verify correctly. (CVE-2009-0591)
*) Reject UniversalString and BMPString types with invalid lengths. This
  prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
  a legal length. (CVE-2009-0590)
*) Set S/MIME signing as the default purpose rather than setting it
  unconditionally. This allows applications to override it at the store
  level.
*) Permit restricted recursion of ASN1 strings. This is needed in practice
  to handle some structures.
*) Improve efficiency of mem_gets: don't search whole buffer each time
  for a '\n'
*) New -hex option for openssl rand.
*) Print out UTF8String and NumericString when parsing ASN1.
*) Support NumericString type for name components.
*) Allow CC in the environment to override the automatically chosen
  compiler. Note that nothing is done to ensure flags work with the
  chosen compiler.

(tnn)