Documentation Changes

The following documentation updates have been made since the last release of this documentation:

• Added the External Security Section Display topic.
• Updated the Interfacing with External Security chapter.
• Added the Overview section.
• Added the Enable SAF Entity Checking section.
• Updated the SAF Entity Types section.
• Updated the Purpose of the Exit section.
• Updated the Define an Exit Using the Sample Exit section.
• Updated the What Register 1 Points To section.