cubicweb #344747 add env var CW_MODE [resolved]

CW_MODE can be either user (running in "dev" mode) or system (running in "installed" mode).

do not forget to update the doc: http://www.cubicweb.org/doc/en/admin/setup.html#environment-configuration

prioritynormal
typeenhancement
done in3.4.0
load0.300
load left0.000
closed by<not specified>