[qt/qt/qtimageformats]: Summary of bulk changes made

Git repository change summary for qt/qt/qtimageformats
Pushed by mirror-service into branch '6.12'.
Changed from 34d6b4d14fd25a82d146f24650471c0ad0ac632f to 41c340409f2711fe13d5e4f2a973fe88a49e55c4
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 41c340409f2711fe13d5e4f2a973fe88a49e55c4 by Qt Cherry-pick Bot (on behalf of Eirik Aavitsland) on 19/08/2026 at 08:36..
Fix config behavior of mng and jasper from "auto" to "no", matching doc

In the configure help, the options for the mng and jasper (jpeg2000)
image handlers are listed as "[no]" - indicating that they are disabled
by default, and must be explicitly enabled. However, the actual
configuration behavior has been that they have been enabled
automatically if the required external libraries were found on the
system - i.e. what the configure help calls "[auto]".

Fix the behavior to match the doc. As these handlers pull in dependency
on external codec libraries that may or may not be well maintained
security-wise, it should be an explicit user decision to enable them.

[ChangeLog][Important Behavior Changes] The mng and jasper (jpeg2000)
image format handlers are no longer built by default if the required
codec libraries are found on the system, but must be explicitly
requested in the configure options. This matches the configure help
documentation for those options.

Task-number: QTBUG-148309
Change-Id: I8f4d1cf715bfde11be31aa2de9340986f0a0a2a7
Reviewed-by: Eskil Abrahamsen Blomfeldt <[email protected]>
(cherry picked from commit 77bf44f617977df8f7572b741d6393142bc9ba03)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>
https://invent.kde.org/qt/qt/qtimageformats/-/commit/41c340409f2711fe13d5e4f2a973fe88a49e55c4