8138725: Add options for Javadoc generation
Reviewed-by: ksrini, bpatel, ahgross

8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8022173: Relax some warnings in doclint
Reviewed-by: darcy

8006251: doclint: incorrect position for diagnostic for illegal text in tags
Reviewed-by: mcimadamore