Update htaccess to grant access on Apache 2.4

With the release off Contao 3.0.6 the htaccess files were updated. Actually the mcw and any extension who used it would be broken on apache 2.4. 

More informations https://github.com/contao/core/issues/5032
Merge pull request #119 from may17/patch-3

Update htaccess to grant access on Apache 2.4