Merge "Fix various language tags used in Html attribs to use wfBCP47()"

diff --combined includes/SkinTemplate.php
index 4af6332,3c58f48..8e41b5a
--- 1/includes/SkinTemplate.php
--- 2/includes/SkinTemplate.php
+++ b/includes/SkinTemplate.php
@@@ -156,8 -156,8 +156,8 @@@ class SkinTemplate extends Skin 
                                                'text' => $ilLangName,
                                                'title' => $languageLinkTitle->getText(),
                                                'class' => $class,
-                                               'lang' => $ilInterwikiCode,
-                                               'hreflang' => $ilInterwikiCode
+                                               'lang' => wfBCP47( $ilInterwikiCode ),
+                                               'hreflang' => wfBCP47( $ilInterwikiCode ),
                                        );
                                }
                        }
@@@ -1043,8 -1043,8 +1043,8 @@@
                                                        'class' => ( $code == $preferred ) ? 'selected' : false,
                                                        'text' => $varname,
                                                        'href' => $title->getLocalURL( array( 'variant' => $code ) + $params ),
-                                                       'lang' => $code,
-                                                       'hreflang' => $code
+                                                       'lang' => wfBCP47( $code ),
+                                                       'hreflang' => wfBCP47( $code ),
                                                );
                                        }
                                }
@@@ -1190,15 -1190,15 +1190,15 @@@
  
                // A print stylesheet is attached to all pages, but nobody ever
                // figures that out. :)  Add a link...
 -              if ( $out->isArticle() ) {
 -                      if ( !$out->isPrintable() ) {
 -                              $nav_urls['print'] = array(
 -                                      'text' => $this->msg( 'printableversion' )->text(),
 -                                      'href' => $this->getTitle()->getLocalURL(
 -                                              $request->appendQueryValue( 'printable', 'yes', true ) )
 -                              );
 -                      }
 +              if ( !$out->isPrintable() && ( $out->isArticle() || $this->getTitle()->isSpecialPage() ) ) {
 +                      $nav_urls['print'] = array(
 +                              'text' => $this->msg( 'printableversion' )->text(),
 +                              'href' => $this->getTitle()->getLocalURL(
 +                                      $request->appendQueryValue( 'printable', 'yes', true ) )
 +                      );
 +              }
  
 +              if ( $out->isArticle() ) {
                        // Also add a "permalink" while we're at it
                        $revid = $this->getRevisionId();
                        if ( $revid ) {