BLENDER_SYSTEM_SCRIPTS now supports multiple paths. Paths are separated by
; on Windows and : on macOS and Linux. (PR#132812)
New BLENDER_CUSTOM_SPLASH to replace the splash screen with the given image file, and BLENDER_CUSTOM_SPLASH_BANNER to overlay an image on the splash. In production environments a modified splash screen can help communicate that Blender was configured for a particular studio or project. (PR#132812)