All symbols starting with `c' in ufs/lfs

• call ufs/lfs/todo:11
• CHECK_SEG ufs/lfs/lfs_syscalls.c:61
• cksum ufs/lfs/lfs_cksum.c:46
• CLEANERINFO ufs/lfs/lfs.h:198
• CLEANSIZE_SU ufs/lfs/lfs.h:200
• Currently ufs/lfs/todo:30