Add entry for military-grade and enterprise-grade security

[daobrien]

From the Word Nerds meeting:

military-grade security

This description is used only when discussing government or military security requirements. Do not use to describe generic security or to emphasize security. If used in this way, link to http://www.redhat.com/en/technologies/industries/government/standards in the citation. Do not use "military-class security." When speaking of military or generic security, be as specific about the type or grade of security used as possible.

Need clarification on "enterprise-grade security."