vendorize: update all vendorized packages. (#2206)

Bring in new changes from upstream for all the packages.

Important ones include
   - gorilla/mux
   - logrus
   - jwt

vendor/github.com/gorilla/mux/mux.go

@@ -10,8 +10,6 @@ import (
 	"net/http"
 	"path"
 	"regexp"
-
-	"github.com/gorilla/context"
 )
 
 // NewRouter returns a new router instance.
@@ -48,7 +46,11 @@ type Router struct {
 	namedRoutes map[string]*Route
 	// See Router.StrictSlash(). This defines the flag for new routes.
 	strictSlash bool
-	// If true, do not clear the request context after handling the request
+	// See Router.SkipClean(). This defines the flag for new routes.
+	skipClean bool
+	// If true, do not clear the request context after handling the request.
+	// This has no effect when go1.7+ is used, since the context is stored
+	// on the request itself.
 	KeepContext bool
 }
 
@@ -59,6 +61,12 @@ func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
 			return true
 		}
 	}
+
+	// Closest match for a router (includes sub-routers)
+	if r.NotFoundHandler != nil {
+		match.Handler = r.NotFoundHandler
+		return true
+	}
 	return false
 }
 
@@ -67,35 +75,34 @@ func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
 // When there is a match, the route variables can be retrieved calling
 // mux.Vars(request).
 func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	// Clean path to canonical form and redirect.
-	if p := cleanPath(req.URL.Path); p != req.URL.Path {
+	if !r.skipClean {
+		// Clean path to canonical form and redirect.
+		if p := cleanPath(req.URL.Path); p != req.URL.Path {
 
-		// Added 3 lines (Philip Schlump) - It was droping the query string and #whatever from query.
-		// This matches with fix in go 1.2 r.c. 4 for same problem.  Go Issue:
-		// http://code.google.com/p/go/issues/detail?id=5252
-		url := *req.URL
-		url.Path = p
-		p = url.String()
+			// Added 3 lines (Philip Schlump) - It was dropping the query string and #whatever from query.
+			// This matches with fix in go 1.2 r.c. 4 for same problem.  Go Issue:
+			// http://code.google.com/p/go/issues/detail?id=5252
+			url := *req.URL
+			url.Path = p
+			p = url.String()
 
-		w.Header().Set("Location", p)
-		w.WriteHeader(http.StatusMovedPermanently)
-		return
+			w.Header().Set("Location", p)
+			w.WriteHeader(http.StatusMovedPermanently)
+			return
+		}
 	}
 	var match RouteMatch
 	var handler http.Handler
 	if r.Match(req, &match) {
 		handler = match.Handler
-		setVars(req, match.Vars)
-		setCurrentRoute(req, match.Route)
+		req = setVars(req, match.Vars)
+		req = setCurrentRoute(req, match.Route)
 	}
 	if handler == nil {
-		handler = r.NotFoundHandler
-		if handler == nil {
-			handler = http.NotFoundHandler()
-		}
+		handler = http.NotFoundHandler()
 	}
 	if !r.KeepContext {
-		defer context.Clear(req)
+		defer contextClear(req)
 	}
 	handler.ServeHTTP(w, req)
 }
@@ -130,6 +137,19 @@ func (r *Router) StrictSlash(value bool) *Router {
 	return r
 }
 
+// SkipClean defines the path cleaning behaviour for new routes. The initial
+// value is false. Users should be careful about which routes are not cleaned
+//
+// When true, if the route path is "/path//to", it will remain with the double
+// slash. This is helpful if you have a route like: /fetch/http://xkcd.com/534/
+//
+// When false, the path will be cleaned, so /fetch/http://xkcd.com/534/ will
+// become /fetch/http/xkcd.com/534
+func (r *Router) SkipClean(value bool) *Router {
+	r.skipClean = value
+	return r
+}
+
 // ----------------------------------------------------------------------------
 // parentRoute
 // ----------------------------------------------------------------------------
@@ -167,7 +187,7 @@ func (r *Router) buildVars(m map[string]string) map[string]string {
 
 // NewRoute registers an empty route.
 func (r *Router) NewRoute() *Route {
-	route := &Route{parent: r, strictSlash: r.strictSlash}
+	route := &Route{parent: r, strictSlash: r.strictSlash, skipClean: r.skipClean}
 	r.routes = append(r.routes, route)
 	return route
 }
@@ -233,7 +253,7 @@ func (r *Router) Schemes(schemes ...string) *Route {
 	return r.NewRoute().Schemes(schemes...)
 }
 
-// BuildVars registers a new route with a custom function for modifying
+// BuildVarsFunc registers a new route with a custom function for modifying
 // route variables before building a URL.
 func (r *Router) BuildVarsFunc(f BuildVarsFunc) *Route {
 	return r.NewRoute().BuildVarsFunc(f)
@@ -305,7 +325,7 @@ const (
 
 // Vars returns the route variables for the current request, if any.
 func Vars(r *http.Request) map[string]string {
-	if rv := context.Get(r, varsKey); rv != nil {
+	if rv := contextGet(r, varsKey); rv != nil {
 		return rv.(map[string]string)
 	}
 	return nil
@@ -317,18 +337,18 @@ func Vars(r *http.Request) map[string]string {
 // after the handler returns, unless the KeepContext option is set on the
 // Router.
 func CurrentRoute(r *http.Request) *Route {
-	if rv := context.Get(r, routeKey); rv != nil {
+	if rv := contextGet(r, routeKey); rv != nil {
 		return rv.(*Route)
 	}
 	return nil
 }
 
-func setVars(r *http.Request, val interface{}) {
-	context.Set(r, varsKey, val)
+func setVars(r *http.Request, val interface{}) *http.Request {
+	return contextSet(r, varsKey, val)
 }
 
-func setCurrentRoute(r *http.Request, val interface{}) {
-	context.Set(r, routeKey, val)
+func setCurrentRoute(r *http.Request, val interface{}) *http.Request {
+	return contextSet(r, routeKey, val)
 }
 
 // ----------------------------------------------------------------------------
@@ -350,6 +370,7 @@ func cleanPath(p string) string {
 	if p[len(p)-1] == '/' && np != "/" {
 		np += "/"
 	}
+
 	return np
 }
 
@@ -365,6 +386,8 @@ func uniqueVars(s1, s2 []string) error {
 	return nil
 }
 
+// checkPairs returns the count of strings passed in, and an error if
+// the count is not an even number.
 func checkPairs(pairs ...string) (int, error) {
 	length := len(pairs)
 	if length%2 != 0 {
@@ -374,7 +397,8 @@ func checkPairs(pairs ...string) (int, error) {
 	return length, nil
 }
 
-// mapFromPairs converts variadic string parameters to a string map.
+// mapFromPairsToString converts variadic string parameters to a
+// string to string map.
 func mapFromPairsToString(pairs ...string) (map[string]string, error) {
 	length, err := checkPairs(pairs...)
 	if err != nil {
@@ -387,6 +411,8 @@ func mapFromPairsToString(pairs ...string) (map[string]string, error) {
 	return m, nil
 }
 
+// mapFromPairsToRegex converts variadic string paramers to a
+// string to regex map.
 func mapFromPairsToRegex(pairs ...string) (map[string]*regexp.Regexp, error) {
 	length, err := checkPairs(pairs...)
 	if err != nil {