core:
 * Fix crashes in malformed files
 * Export SplashFont* symbols used by Scribus
 * Minor code improvements

qt5/qt6:
 * Make sure new signatures are always properly oriented
 * Allow to pass the border width when signing

glib:
 * Enhance find to support multi-line matching

utils:
 * pdftoppm: Fix regression when using single scaleTo. Issue #1062

build system:
 * Allow to disable building manual tests