Merge "docs: Clarified structure of security config file." into mnc-mr-docs am: c3cada0 am: 0e6f90e
am: d893d0c

* commit 'd893d0c5c4dacc702c2bcbc84b2d6f93ed36fef7':
  docs: Clarified structure of security config file.

Change-Id: I4b0b6116cce7f5504d916e87875607c30db9acdd