Update to 3.37.3

Changelog:
No new functionality is introduced in these releases.

The following compatibility fixes are included. Users are encouraged to upgrade.

* Bug 1462303 - Connecting to a server that was recently upgraded to
  TLS 1.3 would result in a SSL_RX_MALFORMED_SERVER_HELLO error.
* Bug 1460673 - Fix a rare bug with PKCS#12 files.

(ryoon)