Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/c96f86eefc215b67dd222694ce2b6f60e6a42b0b/nand_spl 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/nand_spl
John Rigby 6895d4510a Add support for KARO TX25 board 15 years ago
..
board Add support for KARO TX25 board 15 years ago
nand_boot.c
nand_boot_fsl_elbc.c
nand_boot_fsl_nfc.c Add MX25 support to nand_spl fsl nfc driver 15 years ago