Optional setting is optional

[rdlowrey]

My life would be eased if it were possible to set the following options on Addr\Client after instantiation and not require them in the constructor:

• $socketAddr
• $socketPort
• $requestTimeout

Instances can function perfectly well with default values. More importantly, though, the Client class is generally going to be a dependency of other classes and so must be injected. By allowing at least $requestTimeout to be modified after instantiation the classes that are composed of Client instances can expose the option to modify DNS resolution timeouts.

I realize that clients currently open a UDP connection at instantiation time and hold that for the life of the object. As a result, allowing the address values to be modified would add some logic to the current code.

[DaveRandom]

Changing the server in use will be implemented as part of #4. I haven't worked out what the best way to do this would be yet, ideas are welcome.