Add support for branch.repo.username.hostname

If we have a domain configured eg giteapages.io then besides the normal
user.giteapages.io and org.giteapages.io we also support

repo.user.giteapages.io / repo.org.giteapages.io
branch.repo.user.giteapages.io / branch.repo.org.giteapages.io

pkg/gitea/gitea.go

@@ -45,6 +45,7 @@ func (c *Client) Open(name, ref string) (fs.File, error) {
 	}
 
 	owner, repo, filepath := splitName(name)
+
 	// if repo is empty they want to have the gitea-pages repo
 	if repo == "" {
 		repo = c.giteapages