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- Drop "opt" from the directory format.
- The "opt" keyword in Tor's directory formats was originally intended to
- mean, "it is okay to ignore this entry if you don't understand it"; the
- default behavior has been "discard a routerdesc if it contains entries you
- don't recognize."
- But so far, every new flag we have added has been marked 'opt'. It would
- probably make sense to change the default behavior to "ignore unrecognized
- fields", and add the statement that clients SHOULD ignore fields they don't
- recognize. As a meta-principle, we should say that clients and servers
- MUST NOT have to understand new fields in order to use directory documents
- correctly.
- Of course, this will make it impossible to say, "The format has changed a
- lot; discard this quietly if you don't understand it." We could do that by
- adding a version field.
- Status:
- * We stopped requiring it as of 0.1.2.5-alpha. We'll stop generating it
- once earlier formats are obsolete.
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