Add alternative error msg

Author: alxndrsn

tests/integration/test.replication.js

@@ -4265,7 +4265,7 @@ describe('suite2 test.replication.js-down-test', function () {
     });
     const target = new PouchDB(dbs.name);
     await source.replicate.to(target).should.be
-      .rejectedWith(/(^(Failed to fetch|NetworkError when attempting to fetch resource\.)$)|ECONNREFUSED/);
+      .rejectedWith(/(^(Failed to fetch|NetworkError when attempting to fetch resource\.)$)|ECONNREFUSED|EHOSTUNREACH/);
   });
 });