bug#50009: 28.0.50; add CRLF to outgoing ERC protocol logger lines

[Lars Ingebrigtsen]

"J.P." <jp@neverwas.me> writes:

> v5. Having two styles of line terminator (both CRLF and LF) present in
> the same buffer was dumb. So now it's just CRLF everywhere. I've also
> explained a bit about the format in the doc string for the version
> number variable. Thanks.

Thanks; makes sense to me (and seems to work well when testing it), so
I've pushed it to Emacs 28.

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