[Qemu-block] RFC: unified --help information

[Eric Blake]

I noticed that some utilities provide a handy link to the website (which
in turn connects the users to bug database, mailing list, online docs,
...); for example, look at 'ls --help | tail -n3':

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Full documentation at: <http://www.gnu.org/software/coreutils/ls>
or available locally via: info '(coreutils) ls invocation'

or 'm4 --help | tail -n3':
Report bugs to: address@hidden
GNU M4 home page: <http://www.gnu.org/software/m4/>
General help using GNU software: <http://www.gnu.org/gethelp/>

In our executables, we are rather inconsistent with --help

qemu-nbd mentions: Report bugs to <address@hidden>
qemu-ga mentions: Report bugs to <address@hidden>

while qemu-system-*, qemu-img, and qemu-io mention nothing at all.  Is
it worth unifying these to all mention address@hidden as the
primary bug-report site, and/or to add mention of <http://qemu.org> as a
site for further information?

Likewise, with --version, qemu-io and qemu-ga lack the git suffix
present in qemu-system-* and just added in qemu-nbd.

I can submit patches to make things consistent, and think it is 2.10
material, but first want to get consensus on what the behavior should be.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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