[ietf-languages-announcements] Update to the language subtag registry

IANA has added or modified variant tags "barla," "ekavsk," "ijekavsk," and "sotav" and script tags "ahom," "hatr," "mend," "modi," "mult," "pauc," and "sidd" in the language subtag registry. Please see http://www.iana.org/assignments/language-subtag-registry http://www.iana.org/assignments/lang-subtags-templates Best regards, Amanda Baber IANA Request Specialist ICANN