Description of problem:
There are options which are not documented within the man page.

Version-Release number of selected component (if applicable):
util-linux-2.13-0.56.el5

How reproducible:
always

Steps to Reproduce:
1. blockdev --help
2. man blockdev
3. ./compare-options.sh /sbin/blockdev

  
Actual results:
1.
# blockdev --help
Usage:
  blockdev -V
  blockdev --report [devices]
  blockdev [-v|-q] commands devices
Available commands:
	--getsz	(get size in 512-byte sectors)
	--setro	(set read-only)
	--setrw	(set read-write)
	--getro	(get read-only)
	--getss	(get sectorsize)
	--getbsz	(get blocksize)
	--setbsz BLOCKSIZE	(set blocksize)
	--getsize	(get 32-bit sector count)
	--getsize64	(get size in bytes)
	--setra READAHEAD	(set readahead)
	--getra	(get readahead)
	--flushbufs	(flush buffers)
	--rereadpt	(reread partition table)
	--rmpart PARTNO	(disable partition)
	--rmparts	(disable all partitions)

2.
# man blockdev
BLOCKDEV(8)                                                        BLOCKDEV(8)

NAME
       blockdev - call block device ioctls from the command line

SYNOPSIS
       blockdev [options] commands devices

DESCRIPTION
       The utility blockdev allows one to call block device ioctls from the command line.

OPTIONS
       -V     Print version and exit.

       -q     Be quiet.

       -v     Be verbose.

COMMANDS
       --setro
              Set read-only.

       --setrw
              Set read-write.

       --getro
              Get read-only. Print 1 if the device is read-only, 0 otherwise.

       --getss
             Print sectorsize in bytes - usually 512.  --getbsz Print blocksize in bytes.

       --setbsz N
              Set blocksize to N bytes.

       --getsize
              Print device size (in 512-byte sectors).

       --getsize64
              Print device size in bytes.

       --setra N
              Set readahead to N 512-byte sectors.

       --getra
              Print readahead (in 512-byte sectors).

       --flushbufs
              Flush buffers.

       --rereadpt
              Reread partition table.

       --rmparta N
              remove selected partition from kernel (DEPRECATED).

       --rmparts
              remove all device partitions from kernel (DEPRECATED).

                 May 2000                        BLOCKDEV(8)


3.
# ./compare-options.sh /sbin/blockdev
Program path:
	/sbin/blockdev
Man pages found:
	/usr/share/man/man8/blockdev.8.gz
The binary analysis was NOT done
Doing man page vs. usage message comparison

The program reported 19 option(s)
The man page reported 17 option(s)
16 COMMON option(s):
	--flushbufs
	--getbsz
	--getra
	--getro
	--getsize
	--getsize64
	--getss
	--rereadpt
	--rmparts
	--setbsz
	--setra
	--setro
	--setrw
	-V
	-q
	-v
3 option(s) reported by the program ONLY:
	--getsz
	--report
	--rmpart
1 option(s) reported by the man page ONLY:
	--rmparta


Expected results:
Same information in man and --help