In the debian/changelog we can see some information about this options removal from the man page:
stunnel4 (3:4.20-5) unstable; urgency=low
* debian/stunnel3.8:
- Remove references to unsupported -S and -V options in manpage, and
include an explicit list of tunable parameters for -O and their
default values (Closes: #440718).
- Rewrite -P argument description. It must be a file to be created, or
empty (Closes: #398012).
In the debian/changelog we can see some information about this options removal from the man page:
stunnel4 (3:4.20-5) unstable; urgency=low
* debian/stunnel3.8:
- Remove references to unsupported -S and -V options in manpage, and
include an explicit list of tunable parameters for -O and their
default values (Closes: #440718).
- Rewrite -P argument description. It must be a file to be created, or
empty (Closes: #398012).
-- Luis Rodrigo Gallardo Cruz <email address hidden> Thu, 27 Sep 2007 11:54:53 -0500