boot0cfg can not work in nanobsd

[cougar cougar]

Hi all :

When I use updatep2<http://repo.e-stor.cn/estor/changeset/295ffc0a453d#CHANGE-files/root/updatep2>
to
update nanobsd , but boot0cfg can not work ,

I find this can work with gpart:

http://svn.freebsd.org/viewvc/base/head/tools/tools/nanobsd/Files/root/updatep2?view=log

It still in head ? someone forget put this in
stable/<http://svn.freebsd.org/viewvc/base/stable/>
 or releng/ <http://svn.freebsd.org/viewvc/base/releng/> ?