httpd(8) on macOS
The text 9181b2820b21, as Mac OS X 10.1.5, Mac OS X 10.1.4, Mac OS X 10.1.3, Mac OS X 10.1.2, Mac OS X 10.1.1, Mac OS X 10.1 shipped it.
Apache hypertext transfer protocol server
Flags it lists
-
-L -
-S -
-T -
-V -
-X -
-h -
-l -
-t -
-v