Progress: featureless make.

Progress: featureless make.

Process environment variable names, enabling support for the "define" section operation.
The function isascii() is incorrectly used when isalpha() should be used for identifying a valid first character for an environment variable name.
When calling execution section operations like "run" and "shell" make sure environment variables are passed to the environment.

Fix mistake where "group" is used when "groups" and similar mistakes with other words.

Add more output when in verbose mode on completion of certain operations.
For now, just avoid color output in these cases.

Fix minor mistakes in status variable when calling error handlers.

Actually set the fail type when the fail section operation is specified.
Fix the relating error message when the fail type is invalid.