Pass Plugin info array to hook_plugin() implementations

Problem/Motivation

When implementing hook_plugin(), function does not receive any parameter, so it's difficult to perform operations based on the plugin definition.
In my case, I want to centralize the plugin definition in a single hook instead of implementing a different hook per plugin. It is impossible, given that I can't determine which plugin is being executed each time.

Proposed resolution

Pass an extra parameter to hook_plugin(), including the plugin info array.

Remaining tasks

Patch
Approve

User interface changes

None

API changes

hook_plugin() will receive an extra parameter, including the full plugin info array.