Log Message:
Changes 2.6.3
* gnutls: Fix chain verification for chains that ends with RSA-MD2 CAs.
* gnutls: Fix memory leak in PSK authentication.
* certtool: Move gcry_control(GCRYCTL_ENABLE_QUICK_RANDOM, 0) call earlier.
  It needs to be invoked before libgcrypt is initialized.
* gnutls-cli: Return non-zero exit code on error conditions.
* gnutls-cli: Corrected bug which caused a rehandshake request to be ignored.