[$] A DNS flag day

A flag day for DNS is coming on February 1; it may have escaped notice even though it has been planned for nearly a year. Some DNS servers will simply be marked as "dead" by much of the rest of the internet on or after that day, which means that domain owners need to ensure their DNS records will still be available after that point. A longstanding workaround for non-compliant servers will be dropped—mostly for better performance but also in support of DNS extensions, some of which can help alleviate security problems.