(#5589) - add ECONNREFUSED to test.ajax.js
(#5589) - add ECONNREFUSED to test.ajax.js

[skip ci]
cdaringe/pouchdb,pouchdb/pouchdb,cdaringe/pouchdb,mikeymckay/pouchdb,garrensmith/pouchdb,shimaore/pouchdb,mikeymckay/pouchdb,tyler-johnson/pouchdb,tyler-johnson/pouchdb,shimaore/pouchdb,willholley/pouchdb,pouchdb/pouchdb,willholley/pouchdb,garrensmith/pouchdb,tyler-johnson/pouchdb,shimaore/pouchdb,cdaringe/pouchdb,garrensmith/pouchdb,pouchdb/pouchdb,seigel/pouchdb,seigel/pouchdb,willholley/pouchdb,mikeymckay/pouchdb,seigel/pouchdb