Question about the shadow package in Ubuntu 14.04

[Kevin Wilson]

Hello,
I had installed Ubuntu 14.04 from the Daily Build site:
http://cdimage.ubuntu.com/daily-live/current/

After booting, I try to find whether the shadow package is installed by:
dpkg --get-selections | grep  shadow
and I see no result.

According to
https://launchpad.net/ubuntu/+source/shadow
contains these parts:
login: system login tools
passwd: change and administer password and group data
uidmap: programs to help use subuids

So:
[~]#dpkg --get-selections | grep  passwd
passwd install

[~]#dpkg --get-selections | grep  login
login install

But
[~]#dpkg --get-selections | grep  uidmap
does not find the uidmap package.

Also
apt-get install uidmap
does not find it.
and
#apt-get install shadow
does not find it.
I don't understand it:
Doesn't the "shadow" package exist anymore ? was it separated into three
packages? (passwd, login, and uidmap)? and why does apt-get instal shadow
or apt-get install uidmap does not work ?
Any ideas ?

regards,
Kevin
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