What problem does this code solve?
When parsing a map, store null value as JSON null instead of omitting the key/value pair. This optional behavior is only available when parsing maps.

Does the code still compile with Java6?
Yes

Risks
Low

Changes to the API?
Adds a new JSONParserConfiguration option

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No. New unit tests were added

Was any code refactored in this commit?
No

Review status
APPROVED

Starting 3-day comment window.

@effad Thanks for the PR. If you get a chance to make the code updates, they will be included in this PR.
Otherwise, someone will make the changes in a subsequent commit.

@effad Thanks for the PR. If you get a chance to make the code updates, they will be included in this PR. Otherwise, someone will make the changes in a subsequent commit.

On it.