[cl-smtp-devel] bug: external-format is ignored when SSL is used

[Anton Vodonosov]

Hello.

I've just hit a bug when used CL-SMPT - it failed
to send a message with non-ascii characters
over secure connection, despite the default
:external-format :utf-8 is used.

The reason is in the function cl-smtp::smtp-handshake.
When SSL is used, the function throws away the original
flexi-stream having correct external-forma and
creates new flexi-stream, with hardcoded latin-1 external
format.

The attached patch fixes that by reusing the flexi-stream-external-format
of the original flexi-stream when creating the new one.

Best regards,
- Anton
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