Should redefining a class reinitialize shared slots?

[David A. Moon <Moon@STONY-BROOK.SCRC.Symbolics.COM>]

    Date: 30 Sep 87  1521 PDT
    From: Dick Gabriel <RPG@SAIL.STANFORD.EDU>

    ``It seems to me the only predictable rules are:
    (1) all class slots retain their values when the class is redefined.
    (2) all class slots are reinitialized when the class is redefined.''

    There is a third option, which would be to specify the redefinition
    initialization action in the DEFCLASS as a class slot option (:retain or
    :reinitialize, for example).

That's a good point.  I could go along with that if we think the extra
complexity is justified.