it is described in the body though.
Noted by Oota Toshiya <t-oota at dh.jp.nec.com> on the samba mailing list.
Created attachment 5180 [details]
Patch for v3-4-test to fix the manpage
Patch that adds the parameter to the synopsis.
Created attachment 5181 [details]
Patchset for current v3-5-test
This bug also applies to 3.5.
But the patch is different.
These are the two patches that fix the bug in master, applied to v3-5-test.
Pushed, closing out bug report.