Incorrect default value for config option "this_db.import_filter"

An undefined import filter allows all documents to be imported.
This is equivalent to having an import filter that always returns true:

function(doc) {

    return true;

}

The documentation incorrectly states the default import filter returns false (excluding all documents)

There's also no mention of default behaviour on the dedicated Import Filter page:
https://docs.couchbase.com/sync-gateway/current/import-filter.html

Reporter: Ben Brooks
E-mail: ben.brooks@couchbase.com