warn if General is installed via the old slow methods #4022
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Seeing https://discourse.julialang.org/t/adding-package-to-new-environment-takes-long-time/119518/5 makes me wonder how many people out there might be stuck with General installed via the old methods, so this adds a note if so.
I can't imagine anyone intentionally uses either on newer versions for General..If anyone is intentionally using an old format this check can be disabled via
JULIA_PKG_GEN_REG_FMT_CHECK=0