{ $scheme }: wildcard sources in ‘{ $directive }’ directives must include at least one non-generic sub-domain (e.g., *.example.com rather than *.com)
{ $scheme }: '{ $directive }' direktibetako komodin-iturriek gutxienez azpidomeinu ez-generiko bat izan behar dute (adib., *.adibidea.eus, *.eus ordez)