f_swapfs, f_move_itable, f_resize_inode, test_config: Allow the diff options to be set in test_config so that diff -u can be used on platforms that have it. (To be done: checking whether diff can support -u in the configure script.)
m_read_opt, m_std, run_mke2fs, filter_dumpe2fs: Make tests portable so they pass correctly on a FreeBSD system.
set_inode to set_inode_field.
test suite, which tests e2fsck and reszizefs2, respecitvely.