Eric Blake 26752f3be1 virsh: tweak help output for VSH_OT_DATA
https://bugzilla.redhat.com/show_bug.cgi?id=609044 complained
that 'virsh help pool-create-as' didn't document the shortcut
that you can do 'virsh pool-create-as $name $type --target $target'
rather than having to supply the four optional source- arguments
in order to fill out the necessary positional arguments.

This one-liner changes the help output to hopefully make this more obvious:

  NAME
    pool-create-as - create a pool from a set of args

  SYNOPSIS
    pool-create-as <name> [--print-xml] <type> [<source-host>] [<source-path>] [<source-dev>] [<source-name>] [<target>] [--source-format <string>]

  DESCRIPTION
    Create a pool.

  OPTIONS
    [--name] <string>  name of the pool
    --print-xml      print XML document, but don't define/create
    [--type] <string>  type of the pool
    [--source-host] <string>  source-host for underlying storage
    [--source-path] <string>  source path for underlying storage
    [--source-dev] <string>  source device for underlying storage
    [--source-name] <string>  source name for underlying storage
    [--target] <string>  target for underlying storage
    --source-format <string>  format for underlying storage

* tools/virsh.c (vshCmddefHelp): Make it more obvious that data
arguments may, but not must, be specified by option leaders.
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         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>
Description
Read-only mirror. Please submit merge requests / issues to https://gitlab.com/libvirt/libvirt
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