Bug#1018106: sshd: pam_env(sshd:session): deprecated reading of user environment enabled
the cause of this output is the following line in /etc/pam.d/sshd:
# In Debian 4.0 (etch), locale-related environment variables were moved to
# /etc/default/locale, so read that as well.
session required pam_env.so user_readenv=1 envfile=/etc/default/locale
i'm guessing from the comment that user_readenv=1 is in place
primarily to allow overrides of the default locale? etch was
quite some time ago, possibly preceding support for SendEnv?
that seems sufficient workaround if user_readenv is deprecated,
but this is all speculative.
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