Update: Implement "session new" and "session same", improve documentation, update...

Update: Implement "session new" and "session same", improve documentation, update simulate and validate display.

The controller and init programs now support customizing their session as new or session as same state.
A setting global to the entry and exit files is defined as "session new" and "session same".
A setting specific to every rule item is appended to the "with" as either "session_new" or "session_same".

Update the documentation with these changes.
I noticed the documentation could use a little cleanup.

When passing both simulate and validate parameters, the entries and exits (with all related parts) are displayed.
The ordering can be more alphabetic.
It will not be fully alphabetic because there still exists logic that supersedes this, such as:
- "id", "name", and "type" values generally go first regardless of alphabetic ordering (and in that order).
- The simple data is displayed first (ones not using '{' and '}' to display), which are within themselves alphabetic.
- The complex data is displayed last, which are within themselves alphabetic.
- Within the complex data, the "item"s are displayed last.

Cleanup whitespace in execute-common.h.