JSDoc question/suggestion on optional parameters
JSDoc question/suggestion on optional parameters

Hi, Webstorm keeps giving me warnings on the 'redirect' method, because the JSDoc specified two input parameters, both required. There is a JSDoc standard for optional parameters. What is your view on using these in KOA documentation?
http://usejsdoc.org/tags-param.html#optional-parameters-and-default-values

closes #661

zensh/koa,zensh/koa,zhhb/koa,zhhb/koa