Structs starting with `o' in bsd4-4

• Object netiso/xebec/sets.h:13
• obreak_args vm/vm_unix.c:53
• ocg ufs/ffs/fs.h:362
• odirtemplate ufs/ufs/dir.h:145
• omsghdr sys/socket.h:304
• open_args sys/syscallargs.h:26
• open_file stand/stand.h:85
• orlimit sys/resource.h:94
• ortentry net/route.h:109
• osockaddr sys/socket.h:296
• ostat sys/stat.h:47
• ovadvise_args vm/vm_unix.c:125