Revision control

++ Qt 5.9.6 is a bug-fix release. It maintains both forward and backward
++ compatibility (source and binary) with Qt 5.9.0 through 5.9.5.
++
++ For more details, refer to the online documentation included in this
++ distribution. The documentation is also available online:
++
++
++ The Qt version 5.9 series is binary compatible with the 5.8.x series.
++ Applications compiled for 5.8 will continue to run with 5.9.
++
++ Some of the changes listed in this file include issue tracking numbers
++ corresponding to tasks in the Qt Bug Tracker:
++
++
++ Each of these identifiers can be entered in the bug tracker to obtain more
++ information about a particular change.
++
++ ****************************************************************************
++ * Qt 5.9.6 Changes *
++ ****************************************************************************
++
++ - This release contains only minor code improvements.
++
++ QtCore
++ ------
++
++ - [QTBUG-61159] Fixed QStandardPaths::standardLocations() returning some
++ incorrect paths on macOS.
++ - [QTBUG-57299] Fixed some issues with locking files during save using
++ QSaveFile if the target directory is monitored by Dropbox.
++
++ QtWidgets
++ ---------
++
++ - [QTBUG-16252] Fixed geometry not restored correctly for a dock widget
++ after being docked.
++
++ qmake
++ -----
++
++ - [QTBUG-52474][Xcode] Fixed sources being excluded from Time Machine
++ backups.
++ - [QTBUG-66156] $$relative_path() and $$absolute_path() now resolve
++ the base directory to an absolute path.