Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/d0d7361462914cee66f97792bc314bdca67a3ea6/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
Joe Hershberger a26cd04920 arch: Make board selection choices optional 10 years ago
..
cpu
include/asm
lib
Kconfig
Makefile
config.mk