This enumeration determines how the job can be processed,

Values:

IG_TW_JC_JSIC	Detect and include job separator and continue scanning.
IG_TW_JC_JSIS	Detect and include job separator and stop scanning.
IG_TW_JC_JSXC	Detect and exclude job separator and continue scanning.
IG_TW_JC_JSXS	Detect and exclude job separator and stop scanning.
IG_TW_JC_NONE	No job control.