In man page cross refs to sudo, indicate it comes from ports/security/sudo.

cddl/usr.sbin/dwatch/dwatch.1

@@ -68,7 +68,7 @@ utility uses
 .Xr dtrace 1
 to display process info when a given DTrace probe point is triggered.
 Only the root user or users with
-.Xr sudo 8
+.Xr sudo 8 Pq Pa ports/security/sudo
 access can run this command.
 .Pp
 .Nm

sbin/mount_fusefs/mount_fusefs.8

@@ -110,7 +110,7 @@ Prohibit the
 .Cm allow_other
 mount flag.
 Intended for use in scripts and the
-.Xr sudoers 5
+.Xr sudoers 5 Pq Pa ports/security/sudo
 file.
 .It Fl S , Ic --safe
 Run in safe mode (i.e., reject invoking a filesystem daemon).
@@ -253,7 +253,7 @@ beyond the
 .Va vfs.usermount
 sysctl).
 The primary tool for such purposes is
-.Xr sudo 8 .
+.Xr sudo 8 Pq Pa ports/security/sudo .
 However, given that
 .Nm
 is capable of invoking an arbitrary program, one must be careful when doing this.
@@ -275,7 +275,7 @@ ignores the environment variable
 and always behaves as described.
 .Pp
 In general, to be as scripting /
-.Xr sudoers 5
+.Xr sudoers 5 Pq Pa ports/security/sudo
 friendly as possible, no information has a fixed
 position in the command line, but once a given piece of information is
 provided, subsequent arguments/options cannot override it (with the
@@ -355,7 +355,7 @@ does not call any external utility and also provides a hacky
 .Sh SEE ALSO
 .Xr fstat 1 ,
 .Xr mount 8 ,
-.Xr sudo 8 ,
+.Xr sudo 8 Pq Pa ports/security/sudo ,
 .Xr umount 8
 .Sh HISTORY
 .Nm

usr.sbin/bsdconfig/bsdconfig.8

@@ -75,7 +75,7 @@ Print usage statement and exit.
 Secure X11 mode
 .Pq implies Fl X .
 As root, always prompt-for and validate
-.Xr sudo 8
+.Xr sudo 8 Pq Pa ports/security/sudo
 username/password before starting.
 .It Fl X
 Use