Package gorilla/mux implements a request router and dispatcher for matching
incoming requests to their respective handler.

The name mux stands for "HTTP request multiplexer". Like the standard
http.ServeMux, mux.Router matches incoming requests against a list of registered
routes and calls a handler for the route that matches the URL or other
conditions. The main features are:

- It implements the http.Handler interface so it is compatible with the
standard http.ServeMux.
- Requests can be matched based on URL host, path, path prefix, schemes,
header and query values, HTTP methods or using custom matchers.
- URL hosts, paths and query values can have variables with an optional
regular expression.
- Registered URLs can be built, or "reversed", which helps maintaining
references to resources.
- Routes can be used as subrouters: nested routes are only tested if the
parent route matches. This is useful to define groups of routes that share
common conditions like a host, a path prefix or other repeated attributes.
As a bonus, this optimizes request matching.