r/gitea: Handle encoded / characters in HTTP paths

Gitea package names (e.g. OCI images, etc.) can contain `/` charactres.
These are encoded as %2F in request paths.  Apache needs to forward
these sequences to the Gitea server without decoding them.
Unfortunately, the `AllowEncodedSlashes` setting, which controls this
behavior, is a per-virtualhost setting that is *not* inherited from the
main server configuration, and therefore must be explicitly set inside
the `VirtualHost` block.  This means Gitea needs its own virtual host
definition, and cannot rely on the default virtual host.

roles/gitea/tasks/main.yml

@@ -74,10 +74,10 @@
     enabled=yes
 
 - name: ensure apache is configured to proxy for gitea
-  copy:
-    src=gitea.httpd.conf
-    dest=/etc/httpd/conf.d/gitea.conf
-    mode=0644
+  template:
+    src: gitea.httpd.conf.j2
+    dest: /etc/httpd/conf.d/gitea.conf
+    mode: u=rw,go=r
   notify: reload httpd
 - name: ensure selinux allows apache to proxy for gitea
   seboolean: