Deprecate SSLContextBuilder.useProtocol(String) in favor a new method setProtocol(String)

In Core 4.4.x we have:

SSLContextBuilder.useProtocol(String)

and in 5.0, we have:

SSLContextBuilder.setProtocol(String)

This ticket adds SSLContextBuilder.setProtocol(String) to 4.4.x and deprecates useProtocol(String) to make porting to 5.0 easier.