Improved the hook's memory handling for -m 11600 = 7-Zip

[philsmd]

This adds module_hook_extra_param_init () and module_hook_extra_param_term () to the -m 11600 = 7-Zip module to avoid allocating and freeing the buffers each and every time a hook thread is run.

In my benchmark tests the speed wasn't improved that much, but it still makes sense to avoid doing these repetitive tasks if not needed. Some operating system do have slower routines to allocate and deallocate/free the memory and therefore it's also possible that for instance windows speed improves more significantly compared to the linux speed change/improvement.

I think, since we now have this opportunity/possibility to use module_hook_extra_param_init and module_hook_extra_param_term, we should definitely use these new functions wherever needed (it's also good to show other developers how this is normally been done and how you could theoretically refactor and move some code to these new functions to avoid unecessary repetitive tasks).

Thanks a lot