- all files should be xx-*.conf
- kodi.conf should be last. it appends $PATH and $LD_LIBRARY_PATH
for addons. those are very important.
- busybox.conf should be right before kodi. it sets $HOME. nothing but
kodi is allowed to override whatever is set by busybox.conf
- addons.conf should be first, so if we allow addon specific
profile files, those should not be allowed to override env vars
or functions we depend on.