Changes between 4.2.0 and 4.2.1.RC1

This is a release candidate for 4.2.1, a maintenance release that includes a bug fix about TLS settings. This release is backward-compatible with 4.2.0.

SSLContext is always set up to default value when using ConnectionFactory#setUri

Calling ConnectionFactory#setUri would always set the SSLContext property to the default value (which trusts all servers). The SSLContext could be set up after the call to setUri, but a warning would nevertheless be logged. setUri now sets the SSLContext to the default value only if it hasn't been set before.

GitHub issue: #298