EX-8344 lipe: Update manual page

EX-8344 lipe: Update manual page

This small patch expands the explanations for some
commands with information from the development files.
Adds one "todo-list.md" file instead of different files
with similar information.

Test-Parameters: trivial
Signed-off-by: Vitaliy Kuznetsov <vkuznetsov@ddn.com>
Change-Id: I0a3ebda49525d62cd6ca398f12601e588dc2dd42
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/52589
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Colin Faber <cfaber@ddn.com>
Reviewed-by: Alexandre Ioffe <aioffe@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>