[CentOS] lvresize --resizefs

Hi,

	There is a difference between the help of lvresize and its man page. 
In the manpage, there is nothing about the -r or --resizefs function. 
Centos4.

[root at serv01 ~]# lvresize
   Please specify either size or extents (not both)
   lvresize: Resize a logical volume

lvresize
         [-A|--autobackup y|n]
         [--alloc AllocationPolicy]
         [-d|--debug]
         [-h|--help]
         [-i|--stripes Stripes [-I|--stripesize StripeSize]]
         {-l|--extents [+|-]LogicalExtentsNumber[%{VG|LV|FREE}] |
          -L|--size [+|-]LogicalVolumeSize[kKmMgGtTpPeE]}
         [-n|--nofsck]
         [-r|--resizefs]
         [-t|--test]
         [--type VolumeType]
         [-v|--verbose]
         [--version]
         LogicalVolume[Path] [ PhysicalVolumePath... ]