Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/commit/3da04743b8ea44cfcc73fc2491907e189bb67f28
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Fix these:
yaffs_guts.c: At top level:
yaffs_guts.c:400: warning: 'yaffs_SkipFullVerification' defined but not used
Testing shows no changes of the image sizes.
Signed-off-by: Wolfgang Denk <wd@denx.de>