GLOBALS

This is a WiP classification of global variables in CFEngine created with the
purpose of getting rid of them.

GLOBAL_A
--------

Globals filled in during arguments parsing.

Plan of attack: Move to ArgContext.

GLOBAL_C
--------

Globals filled in during startup and not changed afterwards.

Plan of attack: ?

GLOBAL_E
--------

Globals filled in during environment detection and updated every time
environment is re-read.

Plan of attack: Move to EnvContext.

GLOBAL_P
--------

Description: Globals filled in during policy parsing and/or body * control
reading, and updated every time policy is re-read.

Plan of attack: Move to evaluation time resolution as much as possible. Clearly
state in documentation which variables cannot be resolved at evaluation
time. Keep those in EvalContext (?).

GLOBAL_R
--------

Static buffers used for returning values from functions.

Plan of attack: allocate and return values instead of storing them in temporary
variables.

GLOBAL_T
--------

Mutexes, condition variables, once-controls and thread parameters.

Plan of attack: change algorithms to share-nothing.

GLOBAL_X
--------

All other unclassified globals.