ProjectStage can be set via System Property and ProjectStage!=Production should create a log entry

Copied from the mail from Ed Burns:

PROPOSAL

This will not go in the spec, but I propose that existing JSF
implementation coordinate and implement the following behavior.

We introduce a System Property

faces.PROJECT_STAGE

Rationale for using this name: the context-param for this property is
"javax.faces.PROJECT_STAGE". I chose not to use the "javax." prefix
because doing so would be in poor taste. The "javax." prefix is
intended for things in the specification proper.

The valid values of this property are exactly as specified in section
11.1.3. If the System Property is not one of the valid values, the
other sources for a value for this property are consulted.

The implementation will interpret this property as an override for all
other ways of setting the Application.getProjectStage() property.

In addition to the preceding proposal, the implementation will print out
a very prominent log message such as:

********************************************************************

• • • WARNING: JavaServer Faces is running in DEVELOPMENT mode. ***
    • ^^^^^^^^^^^ ***
    • Do NOT deploy to your live server(s) without changing this. ***
    • See Application#getProjectStage() for more information. ***
      ********************************************************************