Description of problem:
rpc.idmapd command options and man pages should update,,,
the -d -U -G have been removed, should update the man page;
and if specify -d or -U or -G, In addition to output error
 -and should do more: output the right usage.

[root@dell-pr7610-01 ~]# rpc.idmapd -d domain 
rpc.idmapd: the -d, -U, and -G options have been removed; please use the configuration file instead.
[root@dell-pr7610-01 ~]# man rpc.idmapd | cat -
RPC.IDMAPD(8)                                                 BSD System Manager's Manual                                                 RPC.IDMAPD(8)

NAME
     rpc.idmapd — NFSv4 ID <-> Name Mapper

SYNOPSIS
     rpc.idmapd [-v] [-f] [-d domain] [-p path] [-U username] [-G groupname] [-c path]

DESCRIPTION
     rpc.idmapd is the NFSv4 ID <-> name mapping daemon.  It provides functionality to the NFSv4 kernel client and server, to which it communicates via
     upcalls, by translating user and group IDs to names, and vice versa.

     The options are as follows:

     -v           Increases the verbosity level (can be specified multiple times).

     -f           Runs rpc.idmapd in the foreground and prints all output to the terminal.

     -d domain    Set domain to domain.  This is used internally by NFSv4 and is typically assigned by the system administrator.  By default, domain is
                  set to be the FQDN of the host, minus the hostname.

     -p path      Specifies the location of the RPC pipefs to be path.  The default value is "/var/lib/nfs/rpc_pipefs".

     -U username  Specifies the NFSv4 nobody user to be username.  The default value is "nobody".

     -G groupname
                  Specifies the NFSv4 nobody group to be groupname.  The default value is "nobody".

     -c path      Use configuration file path.

     -C           Client-only: perform no idmapping for any NFS server, even if one is detected.

     -S           Server-only: perform no idmapping for any NFS client, even if one is detected.

EXAMPLES
     rpc.idmapd -d "citi.umich.edu" -f -vvv



Version-Release number of selected component (if applicable):
all version in  from RHEL5.9 5.10 RHEL6.x to RHEL7.x

How reproducible:
y

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:
update usage output, and man pages

Additional info: