Fix RelPermalink() and Urls in menus vs canonifyUrls

canonifyUrls=true, RelPermalink and baseUrl with sub-path did not work.

This fixes that by adding a check for canonifyUrl=trues=true in RelPermalink().

So given

- baseUrl "http://somehost.com/sub/"
- the path "some-path/file.html"

For canonifyUrls=false RelPermalink() returns "/sub/some-path/file.html"
For canonifyUrls=true RelPermalink() returns "/some-path/file.html"

In the last case, the Url will be made absolute and clickable in a later step.

This commit also makes the menu urls defined in site config releative. To make them work with canonifying of urls, the context root is prepended if canonifying is turned off.

Fixes #519
Fixes #711

hugolib/menu_test.go

@@ -265,18 +265,27 @@ func TestPageMenu(t *testing.T) {
 // issue #719
 func TestMenuWithUnicodeUrls(t *testing.T) {
 	for _, uglyUrls := range []bool{true, false} {
-		doTestMenuWithUnicodeUrls(t, uglyUrls)
+		for _, canonifyUrls := range []bool{true, false} {
+			doTestMenuWithUnicodeUrls(t, canonifyUrls, uglyUrls)
+		}
 	}
 }
 
-func doTestMenuWithUnicodeUrls(t *testing.T, uglyUrls bool) {
+func doTestMenuWithUnicodeUrls(t *testing.T, canonifyUrls, uglyUrls bool) {
+	viper.Set("CanonifyUrls", canonifyUrls)
 	viper.Set("UglyUrls", uglyUrls)
+
 	ts := setupMenuTests(t, MENU_PAGE_SOURCES)
 	defer resetMenuTestState(ts)
 
 	unicodeRussian := ts.findTestMenuEntryById("unicode", "unicode-russian")
 
-	expectedBase := "http://foo.local/zoo/%D0%BD%D0%BE%D0%B2%D0%BE%D1%81%D1%82%D0%B8-%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82%D0%B0"
+	expectedBase := "/%D0%BD%D0%BE%D0%B2%D0%BE%D1%81%D1%82%D0%B8-%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82%D0%B0"
+
+	if !canonifyUrls {
+		expectedBase = "/zoo" + expectedBase
+	}
+
 	var expected string
 	if uglyUrls {
 		expected = expectedBase + ".html"
@@ -288,6 +297,7 @@ func doTestMenuWithUnicodeUrls(t *testing.T, uglyUrls bool) {
 }
 
 func TestTaxonomyNodeMenu(t *testing.T) {
+	viper.Set("CanonifyUrls", true)
 	ts := setupMenuTests(t, MENU_PAGE_SOURCES)
 	defer resetMenuTestState(ts)
 
@@ -333,7 +343,7 @@ func TestHomeNodeMenu(t *testing.T) {
 	defer resetMenuTestState(ts)
 
 	home := ts.site.newHomeNode()
-	homeMenuEntry := &MenuEntry{Name: home.Title, Url: string(home.Permalink)}
+	homeMenuEntry := &MenuEntry{Name: home.Title, Url: home.Url}
 
 	for i, this := range []struct {
 		menu           string