Structs starting with `r' in bsd/vfs

• readlink_args bsd/vfs/vfs_syscalls.c:1582
• rename_args bsd/vfs/vfs_syscalls.c:2029
• revoke_args bsd/vfs/vfs_syscalls.c:2495
• rmdir_args bsd/vfs/vfs_syscalls.c:2154