Some netboot doc cleanups

[Warren Togami <wtogami-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

https://sourceforge.net/apps/trac/dracut/wiki/commandline
> Configuration in initrd ¶
>
> /conf/conf.d/*
>     command line options can override values set here

What is the intent here?  This is only used from 
modules.d/95iscsi/iscsiroot and nowhere else.

> Network ¶
>
>     * ip=[dhcp|on|any]
>           o get ip from dhcp server from all interfaces
>           o If root=dhcp, loop sequentially through all interfaces (eth0, eth1, ...) and use the first with a valid DHCP root-path.

dhcp and any seem to do the same thing.  Get rid of any?

>     * ip=<interface>:[dhcp|on|any]
>           o get ip from dhcp server on a specific interface
>     * ip=[none|off]
>           o no TCP/IP network

What is the point of this?  When is this ever useful?

>     * ip=<client-IP-number>:<gateway-IP-number>:<netmask>:<client-hostname>:<interface>:[dhcp|on|any|none|off|]
>           o explicit network configuration


> rdbreak=[pre-udev|pre-mount|mount|pre-pivot|]
>     drop the shell on defined breakpoint

It isn't clear from this syntax how to make it break in two particular 
places.  Please clarify.

Warren Togami
wtogami-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org

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