Bugid 68841, 43230, 64244 - additional namespace/special page aliases, expanding helpers' forum rights

The attached commits address three tickets:

https://wikia.fogbugz.com/default.asp?68841 - a number of special page and namespace aliases have been added as a follow-up to a previous set of commits - https://github.com/Wikia/app/commit/26d5516f82416e22547677e5dfc155d84b09e48f

https://wikia.fogbugz.com/default.asp?43230 - a few new aliases for Special:Createpage in DE

https://wikia.fogbugz.com/default.asp?64244 - Assigning additional, forum-related rights for helpers.

Please review the commits and if everything is OK merge with the main branch.