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 <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Acked-by: Fam Zheng <[email protected]>
Acked-by: Luiz Capitulino <[email protected]>
Acked-by: Eduardo Habkost <[email protected]>
Acked-by: Daniel P. Berrangé <[email protected]>
Acked-by: Cleber Rosa <[email protected]>
Message-id: [email protected]
Signed-off-by: John Snow <[email protected]>

python/qemu/aqmp/qmp_shell.py

@@ -1,11 +1,12 @@
 #
-# Copyright (C) 2009, 2010 Red Hat Inc.
+# Copyright (C) 2009-2022 Red Hat Inc.
 #
 # Authors:
 #  Luiz Capitulino <[email protected]>
+#  John Snow <[email protected]>
 #
-# This work is licensed under the terms of the GNU GPL, version 2.  See
-# the COPYING file in the top-level directory.
+# This work is licensed under the terms of the GNU LGPL, version 2 or
+# later. See the COPYING file in the top-level directory.
 #
 
 """