REG_KEY

Purpose:        Gets registry keys

Input Syntax:   REG_KEY

Input Params:   none

Output Syntax:  +<value> | -<message>

Output Params:  <keys>    CHAR(256) = registry keys, separated by space
                <message> CHAR(128) = human-readable message

Implementation: registry.c / f4adp_reg_keys()

Right required: R_REGISTRY
