Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/981219eebe3cc29f155a37951788c18786260514/include/mtd 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/include/mtd
Masahiro Yamada 3b61297024 kbuild: force to define __UBOOT__ in all the C sources 11 years ago
..
cfi_flash.h
mtd-abi.h kbuild: force to define __UBOOT__ in all the C sources 11 years ago
ubi-user.h