rpc.3 registerrpc() question

[Jared Yanovich <jjy2+@pitt.edu>]

src/lib/libc/rpc/rpc.3 shows:

     int
     registerrpc(u_long prognum, u_long versnum, u_long procnum,
             char *(*procname)(), xdrproc_t inproc, xdrproc_t outproc);

and the corresponding description:

     registerrpc() will register a procedure procname with the RPC service
     package.  If a request arrives for program prognum, version versnum, and
     procedure procnum, procname is called with a pointer to its parameter(s);
     progname should return a pointer to its static result(s); inproc is used
     to decode the parameters while outproc is used to encode the results.
     This routine returns zero if the registration succeeded, -1 otherwise.

`progname' appears no where else in that document, yet in the code,
the argument is named `progname' and `procname' is not used anywhere.
FreeBSD and NetBSD, at least, are in the same situation.  Has this
not been changed for legacy or compliancy reasons, or am I missing
something?

Index: rpc.3
===================================================================
RCS file: /cvs/src/lib/libc/rpc/rpc.3,v
retrieving revision 1.34
diff -u -r1.34 rpc.3
--- rpc.3	2003/12/31 03:27:23	1.34
+++ rpc.3	2004/04/21 05:32:11
@@ -812,7 +812,7 @@
 .Fa procnum ,
 .Fa procname
 is called with a pointer to its parameter(s);
-.Fa progname
+.Fa procname
 should return a pointer to its static result(s);
 .Fa inproc
 is used to decode the parameters while