[dconf: 7/7] Merge branch 'patch/engine-check' into 'master'

[Daniel Playfair Cal <danielplayfaircal src gnome org>]

commit 6e19dec8d57174f3928171e102c24102f2b61ead
Merge: 6f7f010b 5ed0724c
Author: Daniel Playfair Cal <daniel playfair cal gmail com>
Date:   Sat Dec 19 02:27:07 2020 +0000

    Merge branch 'patch/engine-check' into 'master'
    
    Engine: Do not emit optimistic change notifications unless the local value is different
    
    See merge request GNOME/dconf!2

 client/meson.build                     |   5 +
 client/symbol.map                      |  14 +++
 {service => common}/dconf-gvdb-utils.c |  76 ++++++++++------
 {service => common}/dconf-gvdb-utils.h |   5 +-
 common/meson.build                     |   5 +-
 engine/dconf-engine.c                  |  85 ++++++++++++++++-
 service/dconf-writer.c                 |   2 +-
 service/meson.build                    |   7 +-
 tests/engine.c                         | 162 ++++++++++++++++++++++++++++++++-
 9 files changed, 318 insertions(+), 43 deletions(-)
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