Extend all to more resources

Added more things from the list here:
https://github.com/kubernetes/kubernetes/blob/master/pkg/kubectl/cmd/cmd.go#L159

Update the devel/kubectl-conventions.md with the rules mentioned by
a few folks on which resources could be added to the special 'all' alias

Related to a suggestion in issue #22337

pkg/kubectl/kubectl.go

@@ -38,6 +38,18 @@ serviceaccounts (aka 'sa'), ingresses (aka 'ing'), horizontalpodautoscalers (aka
 componentstatuses (aka 'cs), endpoints (aka 'ep'), petsets (alpha feature, may be unstable) and secrets.`
 )
 
+// userResources is a group of resources mostly used by a kubectl user
+var userResources = []unversioned.GroupResource{
+	{Group: "", Resource: "pods"},
+	{Group: "", Resource: "replicationcontrollers"},
+	{Group: "", Resource: "services"},
+	{Group: "apps", Resource: "petsets"},
+	{Group: "autoscaling", Resource: "horizontalpodautoscalers"},
+	{Group: "extensions", Resource: "jobs"},
+	{Group: "extensions", Resource: "deployments"},
+	{Group: "extensions", Resource: "replicasets"},
+}
+
 type NamespaceInfo struct {
 	Namespace string
 }
@@ -107,6 +119,15 @@ func (m OutputVersionMapper) RESTMapping(gk unversioned.GroupKind, versions ...s
 // resources.  It expands the resource first, then invokes the wrapped RESTMapper
 type ShortcutExpander struct {
 	RESTMapper meta.RESTMapper
+
+	All []unversioned.GroupResource
+}
+
+func NewShortcutExpander(delegate meta.RESTMapper) ShortcutExpander {
+	return ShortcutExpander{
+		All:        userResources,
+		RESTMapper: delegate,
+	}
 }
 
 var _ meta.RESTMapper = &ShortcutExpander{}
@@ -139,7 +160,19 @@ func (e ShortcutExpander) ResourceSingularizer(resource string) (string, error)
 	return e.RESTMapper.ResourceSingularizer(expandResourceShortcut(unversioned.GroupVersionResource{Resource: resource}).Resource)
 }
 
+// AliasesForResource returns whether a resource has an alias or not
 func (e ShortcutExpander) AliasesForResource(resource string) ([]string, bool) {
+	if strings.ToLower(resource) == "all" {
+		var resources []unversioned.GroupResource
+		if resources = e.All; len(e.All) == 0 {
+			resources = userResources
+		}
+		aliases := []string{}
+		for _, r := range resources {
+			aliases = append(aliases, r.Resource)
+		}
+		return aliases, true
+	}
 	return e.RESTMapper.AliasesForResource(expandResourceShortcut(unversioned.GroupVersionResource{Resource: resource}).Resource)
 }