Issue Description

I updated echo in one of my projects. After that my static configuration didn't work without changes. Before it automatically resolved to an existing index.html. After that I had to point to that file.

My code was something like that:

docsGroup := e.Group("")
docsGroup.Static("/", "docs")

In docs is an index.html which was delivered when no path was given

I have several questions, hopefully the output of this is I can submit a PR for some doc updates:

1. the node-sonos-http-api allows for a folder named presets in it (for organization purposes) and it is the preferred way so perhaps we should update accordingly (I believe it even hot loads them / don't have to restart the server when you add new json files to presets folder)
2. When I have a .j

https://github.com/onrik/logrus/blob/6a64e23a4923a8d0d4db2806dcf3e55af1e48f61/filename/filename.go#L32-L33

Hi,
Although the function name is now available, the formatter doesn't use it.
Would be nice if it did 👍
(if some users feel like it is too cumbersome and prefer only file+line, maybe should introduce a separate one that is identical to filename.go except for including the func name

The RequestValidator in not complete under unit tests. It's not that easy because of openssl connects.