while here i've reformatted the page to stop kidding that -s is 4 options;
original issue kind of spotted by adam thompson, though note i am not fixing the
issue he complained about (i'll address that mail in a minute);

time from HTTPS servers, by parsing the Date: header, and use the
median constraint time as a boundary to verify NTP responses.  This
adds some level of authentication and protection against MITM attacks
while preserving the accuracy of the NTP protocol; without relying on
authentication options for NTP that are basically unavailable at
present.  This is an initial implementation and the semantics will be
improved once it is in the tree.
Discussed with deraadt@ and henning@
OK henning@

all the other tools do. changes option 'sensors' to 'Sensors'.
ok henning@, and grudgingly phessler@

every time
ok jmc

NB: this utility has only one option, and it's not optional! i haven;t
marked -s as being mandatory, since hopefully someone will make
ntpctl run without arguments do something useful;

* For time_t values, use the printf("%lld", (long long)t) idiom.
* Don't print "Invalid program name" in usage() when main() just runs ntpd.
* Make "Show/Shows" consistent in the manual, sort .Xr and correct .Ox.
OK phessler@

diff from Mike Miller <mmiller mgm51 com> (many thanks!)
OK phessler@, henning@, todd@