Issue #2249723 by andrei.dincu: url_alias table has langcode column instead of language, change requests in xmlsitemap.generate.inc and XmlSitemapGeneratorService class

Issue #2249723 by andrei.dincu: Addd linkLoad() and linkLoadMultiple in XmlSitemapLinkStorage; add documentation for XmlSitemapLinkStorage class

Issue #2249723 by andrei.dincu: Replace xmlsitemal_link_save/delete from xmlsitemap_custom edit/delete/add form  with static methods from XmlSitemapLinkStorage class

Issue #2249723 by andrei.dincu: Create XmlSitemapLinkStorage class to interact with xmlsitemap table for sitemap links

Issue #2249723 by andrei.dincu: Start XmlSitemapCustomEditForm class and update xmlsitemap_custom.routing.yml file

Issue #2249723 by andrei.dincu: XmlSitemapCustomAddForm check if path is valid in validateForm() method

Issue #2249723 by andrei.dincu: XmlSitemapCustomAddForm check if link is duplicate in validateForm()

Issue #2249723 by andrei.dincu: XmlSitemapCustomListControlle display edit/delete as operations for every custom link

Issue #2249723 by andrei.dincu: Update XmlSitemapDeleteForm to return new Url() for getCancelRoute() method

Issue #2249723 by andrei.dincu: Replace module_invoke_all() with moduleHandler()->invokeAll() in xmlsitemap_link_save()

Issue #2249723 by andrei.dincu: Create XmlSitemapCustomListController class to list all custom links

Issue #2249723 by andrei.dincu: Replace global  with \Drupal::currentUser() in xmlsitemap_switch_user()

Issue #2249723 by andrei.dincu: Change variable_get() with Drupal::config()->get in xmlsitemap_xmlsitemap_link_alter() function

Issue #2249723 by andrei.dincu: Check anonymous user has access user profiles permission in hook_install

Issue #2249723 by andrei.dincu: Change name for variable from xmlsitemap_rebuild_needed to rebuild_needed

Issue #2249723 by andrei.dincu: Change variable name to rebuild_needed in xmlsitemap_rebuild_batch() function

Issue #2249723 by andrei.dincu: Issue #2249723 by andrei.dincu: Set batch limit in xmlsitemap.generate.inc

Issue #2249723 by andrei.dincu: xmlsitemap_sitemap_load_by_context() and xmlsitemap_get_directory() process XmlSitemapInterface object

Issue #2249723 by andrei.dincu: Customize callback method to output xml in XmlSitemapController class

Issue #2249723 by andrei.dincu: xmlsitemap_get_current_chunk() takes XmlSitemapInterface object as first argument

Issue #2249723 by andrei.dincu: xmlsitemap_sitemap_get_file() takes first argument as XmlSitemapInterface object

Issue #2249723 by andrei.dincu: Transform stdClass  to XmlSitemapInterface  in xmlsitemap_sitemap_save