Fix AttributeError for "lang" on repo/client connections This is a regression introduced by b48020a80dc3, which removed call to set_language from the `req._set_user` method. This is fine, but we still want a language on connections, so we've to handle it if necesary in Connection.__enter__ (i.e. once connection is properly open). When using pyramid front-end, which has a users cache, we've to cache its language as well because we must not access its preferred_language method since it's not bound to a proper connection.

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/var/log/cubicweb/*.log {

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        weekly

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        missingok

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        rotate 10

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        compress

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        delaycompress

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        notifempty

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        create 640 root adm

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        sharedscripts

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        postrotate

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           if [ -x /usr/sbin/invoke-rc.d ]; then \

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              invoke-rc.d cubicweb reload > /dev/null 2>&1; \

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           else \

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              /etc/init.d/cubicweb reload > /dev/null 2>&1; \

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           fi; \

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        endscript

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}