Improve labeling and implementation of IPC/non-IPC connection modes.

[alanseiden]

Replace the terminology and implementation of "internal key" and "stateless" to make connections easier to understand. Many users doing it wrong (causing terrible problems) because they didn't understand the IPC concept (/tmp/alan) and because the PHP toolkit 1.x defaults to stateful mode using the same key for everyone (/tmp/Toolkit). Tony suggests creating a main class (Base) that specific connection mode classes could inherit from. Name them well. Alan suggests "privateJob" or the like for stateful connections. Hide the IPC concept. Perhaps accept a key that the toolkit adds to /tmp.

[alanseiden]

Good ideas but four years later with more toolkit userland code written, we don't relish the backward compatibility break. At this stage, we suggest better code examples with accurate comments. Close the issue after relevant documentation/example issues have been created.

[alanseiden]

Examples to be written:

• stateless option set with explanation
• stateful option with explanation of why not to use /tmp/Toolkit and about disconnecting.

Create an issue for each of the above, or a single issue for both examples to be written.