scheduler(8) on Linux
The text d5bb3f2ff7a5, as Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it.
zmailer transport queue scheduler daemon
Flags it lists
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-E -
-F -
-H -
-HH -
-L -
-N -
-P -
-Q -
-S -
-V -
-W -
-d -
-f -
-i -
-l -
-q -
-v