Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/d8bafe1310487ba0e0785997726b4792072178d3/arch/nios2 You should set ROOT_URL correctly, otherwise the web may not work correctly.
upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
 
 
 
 
 
 
u-boot/arch/nios2
Daniel Schwierzeck e19db555b4 Kbuild: introduce Makefile in arch/$ARCH/ 11 years ago
..
cpu
include/asm
lib
Kconfig
Makefile
config.mk