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9877ce6c56
strongSwan logs all syslog messages using LOG_INFO for historical reasons, regardless of the strongSwan loglevel used producing the log message. In some setups with advanced logging infrastructure, it may be feasible to be more verbose when logging in strongSwan, but then filter messages on the syslog server. While this may be possible by custom syslog filtering rules matching the log level included with the log_level setting, this is not super convenient. So add a new map_level setting, which can map strongSwan loglevels to syslog loglevels. By default this is disabled, keeping the existing behavior. If enabled, it maps strongSwan loglevels to syslog loglevels at a given syslog loglevel offset. Closes strongswan/strongswan#859