[Development] MAINTAINERS, your action needed: Qt change files

Hi all, We have still missing quite many +2 from 5.9.3 change files, see https://codereview.qt-project.org/#/q/message:%22file+for+Qt+5.9.3%22,n,z - qt/qtx11extras - qt/qt3d - qt/qtgraphicaleffects - qt/qtwebchannel - qt/qtwebview - qt/qtpurchasing - qt/qtscxml - qt/qtwebengine - qt/qtlocation -

[Development] Why is year 7999 the end of time ?

Investigating bug QTBUG-64401, I discover qdatetimeparser_p.h defining #define QDATETIMEEDIT_DATE_MAX QDate(7999, 12, 31) which dates back to the original import of qtbase by Nokia (albeit John Layt moved it from qdatetime_p.h in 2013). If anyone knows any cause or just impediment against