Megatest

| #{scheme (scheme code...)} | Execute arbitrary scheme code | Any valid scheme        | Value returned from the call is converted to a string and processed as part of the config file
| #{system command}          | Execute program, inserts exit code  | Any valid Unix command  | Discards the output from the program
| #{shell  command} or #{sh ...}  | Execute program, inserts result from stdout | Any valid Unix command | Value returned from the call is converted to a string and processed as part of the config file
| #{realpath path} or #{rp ...}   | Replace with normalized path | Must be a valid path |
| #{getenv VAR} or #{gv VAR}      | Replace with content of env variable | Must be a valid var |
| #{get s v} or #{g s v}     | Replace with variable v from section s | Variable must be defined before use |
| #{rget v}                  | Replace with variable v from target or default of runconfigs file | |
| #{mtrah}                   | Replace with the path to the megatest testsuite area | | 
|======================

Config File Settings
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Settings in megatest.config