python/qmp-shell: relicense as LGPLv2+

python/qmp-shell: relicense as LGPLv2+

qmp-shell is presently licensed as GPLv2 (only). I intend to include
this tool as an add-on to an LGPLv2+ library package hosted on
PyPI.org. I've selected LGPLv2+ to maximize compatibility with other
licenses while retaining a copyleft license.

To keep licensing matters simple, I'd like to relicense this tool as
LGPLv2+ as well in order to keep the resultant license of the hosted
release files simple -- even if library users won't "link against" this
command line tool.

Therefore, I am asking permission from the current authors of this
tool to loosen the license. At present, those people are:

- John Snow (me!), 411/609
- Luiz Capitulino, Author, 97/609
- Daniel Berrangé, 81/609
- Eduardo Habkost, 10/609
- Marc-André Lureau, 6/609
- Fam Zheng, 3/609
- Cleber Rosa, 1/609

(All of which appear to have been written under redhat.com addresses.)

Eduardo's fixes are largely automated from 2to3 conversion tools and may
not necessarily constitute authorship, but his signature would put to
rest any questions.

Cleber's changes concern a single import statement change. Also won't
hurt to ask.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Fam Zheng <fam@euphon.net>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Acked-by: Eduardo Habkost <eduardo@habkost.net>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Cleber Rosa <crosa@redhat.com>
Message-id: 20220325200438.2556381-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>