User ID length requirement

[Todd]

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Does someone know if it's required in the OpenPGP spec that a user id be 5
characters or greater?  I am "cursed" with a 4 letter first name and when I
try and generate a new key or add a new user id with just my first name, gpg
gives me the error "Name must be at least 5 characters long."  I can easily
work around this by using Todd. or something like that (or by using pgp,
which doesn't seem to care about the uid length).

I see this comes from g10/keygen.c and looks to be easily modified, but I'm
curious if this is part of the spec or not.

- -- 
Todd

The majority, oppressing an individual, is guilty of a crime, abuses its
strength, and by acting on the law of the strongest breaks up the
foundations of society.
    -- Thomas Jefferson

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