s-s-d(8): Mention --pid and --ppid in the DESCRIPTION section

debian/changelog

@@ -8,6 +8,7 @@ dpkg (1.17.19) UNRELEASED; urgency=low
     before executing the program will not be properly reported to the caller.
     Regression introduced in dpkg 1.17.14. Closes: #765110
   * Add new --remove-pidfile option to start-stop-daemon.
+  * Mention --pid and --ppid in start-stop-daemon(8) man page DESCRIPTION.
 
   [ Updated programs translations ]
   * Italian (Milo Casagrande): Closes: #765748

man/start-stop-daemon.8

@@ -35,14 +35,16 @@ Using one of the matching options, \fBstart\-stop\-daemon\fP
 can be configured to find existing instances of a running process.
 .PP
 Note: unless
+.B \-\-pid
+or
 .B \-\-pidfile
-is specified,
+are specified,
 .B start\-stop\-daemon
 behaves similar to
 .BR killall (1).
 .B start\-stop\-daemon
 will scan the process table looking for any processes which
-match the process name, uid, and/or gid (if specified). Any
+match the process name, parent pid, uid, and/or gid (if specified). Any
 matching process will prevent
 .BR \-\-start
 from starting the daemon. All matching processes will be sent the TERM