Add information about jboss-permissions.xml to New features section in the Release notes

Book: Release notes
Revision: n_2202663_700-release-notes_version_7.0_edition_1.0_release_0-revision_7877113

Issue description:
There is missing information about new Security Manager features.

JEE 7 specification (JSR 342 in section EE.6.2.2) defines how permissions can be granted to deployments by introducing META-INF/permissions.xml (only allowed in top level deployment). EAP goes one step further and allows granting permissions on subdeployment level by introducing META-INF/jboss-permissions.xml.

Suggestion for improvement:
Add a paragraph under the New Features chapter with sth like:

Java EE Security Manager
Granting permissions to deployments is based on JEE 7 specification (JSR 342 in section EE.6.2.2). More fine-grained control is possible by using custom deployment descriptor META-INF/jboss-permissions.xml which can be also defined for submodules of the deployment. You can find more details about permissions configuration in the book "How To Configure Server Security".