See COUCHDB-1677. This is a feature for an optional secondary log file which is basically the output of JavaScript log() functions.
No tests; I did not see any log etap log tests. However some of the JavaScript _log tests exercise (some of) this code. Documented the existence of _config/log/query_server_file and the ability to fetch /_log/query_server Please check my code. Thank you. -- Iris Couch
