LUDOC-11 proc: correct some errors in Chapter 31.9

LUDOC-11 proc: correct some errors in Chapter 31.9

This patch includes the following changes:
1) correct some proc parameter name erros
2) correct "lctl conf_param" description and add
   "lctl set_param -P" usage.

Signed-off-by: Emoly Liu <emoly.liu@intel.com>
Change-Id: I9e972558c389fa537b8d3cd59f6b9fc873fbcd91
Reviewed-on: http://review.whamcloud.com/7628
Tested-by: Hudson
Reviewed-by: Linda Bebernes <linda.bebernes@intel.com>
Reviewed-by: Richard Henwood <richard.henwood@intel.com>