Log Message:
Update to 3.17.4

Changelog:
Network Security Services (NSS) 3.17.4 is a patch release for NSS 3.17.

No new functionality is introduced in this release.

Notable Changes:
* If an SSL/TLS connection fails, because client and server don't have
  any common protocol version enabled, NSS has been changed to report
  error code SSL_ERROR_UNSUPPORTED_VERSION (instead of reporting
  SSL_ERROR_NO_CYPHER_OVERLAP).
* libpkix was fixed to prefer the newest certificate, if multiple
  certificates match.
* fixed a memory corruption issue during failure of keypair generation.
* fixed a failure to reload a PKCS#11 module in FIPS mode.
* fixed interoperability of NSS server code with a LibreSSL client.