admin/includes/confirm.xsl missing -> Confirmation in admin webGUI cannot be done

Hi.

When installing with ./autogen.sh && ./configure && make -j5 install the file admin/includes/confirm.xsl is missing and therefore, if a confirmation is needed in the admin webGUI, it cannot be done.

I fixed this by adding includes/confirm.xsl in the nobase_dist_admin_DATA part of https://gitlab.xiph.org/xiph/icecast-server/-/blob/master/admin/Makefile.am.

Is there a proper way to do merge requests for this project? If I try to clone the repo in this Gitlab I only get the error that I do not have the rights to do that.