Provide means to avoid SparkPost's tracking option
With the spark post API, it's possible to disable tracking
information using ->setOptions(). Sometimes some users don't
want these tracking information within their email content so
add support in this extension to configure this behavior.
This introduces 3 config variables that can be used in the
These can be set to false or true depending on the case but will
default to "true" if not set as this is normal behavior in spark