Fix http scheme urls in documentation

docs/content/providers/consul-catalog.md

@@ -532,7 +532,7 @@ The default host rule for all services.
 
 For a given service, if no routing rule was defined by a tag, it is defined by this `defaultRule` instead.
 The `defaultRule` must be set to a valid [Go template](https://golang.org/pkg/text/template/),
-and can include [sprig template functions](http://masterminds.github.io/sprig/).
+and can include [sprig template functions](https://masterminds.github.io/sprig/).
 The service name can be accessed with the `Name` identifier,
 and the template has access to all the labels (i.e. tags beginning with the `prefix`) defined on this service.
 

docs/content/providers/docker.md

@@ -428,7 +428,7 @@ _Optional, Default=```Host(`{{ normalize .Name }}`)```_
 The `defaultRule` option defines what routing rule to apply to a container if no rule is defined by a label.
 
 It must be a valid [Go template](https://golang.org/pkg/text/template/), and can use
-[sprig template functions](http://masterminds.github.io/sprig/).
+[sprig template functions](https://masterminds.github.io/sprig/).
 The container service name can be accessed with the `Name` identifier,
 and the template has access to all the labels defined on this container.
 

docs/content/providers/ecs.md

@@ -139,7 +139,7 @@ _Optional, Default=```Host(`{{ normalize .Name }}`)```_
 The `defaultRule` option defines what routing rule to apply to a container if no rule is defined by a label.
 
 It must be a valid [Go template](https://golang.org/pkg/text/template/), and can use
-[sprig template functions](http://masterminds.github.io/sprig/).
+[sprig template functions](https://masterminds.github.io/sprig/).
 The container service name can be accessed with the `Name` identifier,
 and the template has access to all the labels defined on this container.
 

docs/content/providers/file.md

@@ -199,7 +199,7 @@ providers:
 
 Traefik supports using Go templating to automatically generate repetitive sections of configuration files.
 These sections must be a valid [Go template](https://golang.org/pkg/text/template/), and can use
-[sprig template functions](http://masterminds.github.io/sprig/).
+[sprig template functions](https://masterminds.github.io/sprig/).
 
 To illustrate, it is possible to easily define multiple routers, services, and TLS certificates as described in the following examples:
 

docs/content/providers/marathon.md

@@ -114,7 +114,7 @@ The default host rule for all services.
 For a given application, if no routing rule was defined by a label, it is defined by this `defaultRule` instead.
 
 It must be a valid [Go template](https://golang.org/pkg/text/template/),
-and can include [sprig template functions](http://masterminds.github.io/sprig/).
+and can include [sprig template functions](https://masterminds.github.io/sprig/).
 
 The app ID can be accessed with the `Name` identifier,
 and the template has access to all the labels defined on this Marathon application.

docs/content/providers/rancher.md

@@ -96,7 +96,7 @@ The default host rule for all services.
 The `defaultRule` option defines what routing rule to apply to a container if no rule is defined by a label.
 
 It must be a valid [Go template](https://golang.org/pkg/text/template/), and can use
-[sprig template functions](http://masterminds.github.io/sprig/).
+[sprig template functions](https://masterminds.github.io/sprig/).
 The service name can be accessed with the `Name` identifier,
 and the template has access to all the labels defined on this container.