Where does umask get set at system startup? Mine seems to have changed to 0002 recently

[Chris Green]

I have quite a few systems running [x]ubuntu, a mix of 20.04, 20.10
and maybe others.

The default umask always used to be 0022 but all my systems now have
it set to 0002.  I can't see where it's set anywhere in /etc, can
anyone tell me how it gets set and why (if it has) the default has
been changed from 0022 to 0002?

-- 
Chris Green