{ $scheme }: wildcard sources in ‘{ $directive }’ directives must include at least one non-generic sub-domain (e.g., *.example.com rather than *.com)
{ $scheme }: fuents comodín en directivas '{ $directive }' han d'incluyir a lo menos un subdominio no chenerico (por eixemplo, *.example.com en cuenta de *.com)