[tx-robot] updated from transifex

apps/files/l10n/it.php

apps/files/l10n/nl.php

apps/files/l10n/ru.php

apps/files/l10n/tr.php

apps/files_encryption/l10n/ko.php

apps/files_sharing/l10n/ko.php

core/l10n/ko.php

core/l10n/ru.php

l10n/el/settings.po

l10n/it/files.po

l10n/it/settings.po

l10n/ko/core.po

l10n/ko/files_encryption.po

l10n/ko/files_sharing.po

l10n/ko/lib.po

l10n/ko/user_webdavauth.po

l10n/nl/files.po

l10n/ru/core.po

l10n/ru/files.po

l10n/ru/settings.po