Desktop App Toolkit uses GLib as the D-Bus library for quite long time, but GLib is not only a D-Bus library, it's more a basic library providing native Linux APIs implementing various specs. The situation right now is that DESKTOP_APP_DISABLE_DBUS_INTEGRATION disables not only D-Bus code but all the native API integration such as MIME handling or .desktop file parsing. In other words, the option disables native Linux APIs on Linux what is absurd and doesn't have any sense.
On at least OpenBSD, malloc(3) is preferred to other implementations
like jemalloc for various reasons.
It is common for portable third-party software (ports) to provide a
switch for en/disabling jemalloc.
tdesktop makes this easy since it does not contain any (je)malloc
specific code (anymore).
Introduce a new default-off option that disables jemalloc when enabled
explicitly; this also allow developers and package maintainers more
easily to try different malloc implementations, e.g. for debugging.
Memory leaks reported in the slightly old issue
"The app consumes an unexpectedly large amount of RAM"
https://github.com/telegramdesktop/tdesktop/issues/16084 could not
be reproduced on OpenBSD/amd64 with malloc(3) using tdesktop >= 3.3.1.
qt5ct is removed since internal gtk integration is good enough
Removed the ability to override path to qtwayland client headers since that hack is no longer used
QXdgDesktopPortalThemePlugin is no longer linked since custom xdg-desktop-portal dialog implementation is present
