nnrpd(8) on Linux
The text acbc21fab36d, as Debian 5.0 (Lenny) shipped it.
NNTP server for reader clients
Flags it lists
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-D -
-I -
-P -
-S -
-b -
-c -
-f -
-g -
-i -
-n -
-o -
-p -
-r -
-s -
-t