Additionaly use template engine and separate environment definition to own
section.

Other tools will have possiblity to read runtime, separated, environment of
SlapOS node.

This is following the idea of providing isolation from operating system
environment.

It is not required to have this option set into the stack.

According to the policy adopted this must be overridden by the
software developer.

The name should not be set directly.
It is much safer to have the prebuild egg name acquired from the proper
section.
 i.e. (${section-name:egg-name})