Remove support for compression on send

Remove support for compression on send

We can't disable compression support on receive because
that would break too many configurations out there. But
we can remove the support for compressing outgoing traffic,
it was disabled by default anyway.

Makes "--allow-compression yes" an alias for
"--allow-compression asym" and removes all resulting dead code.

Change-Id: I402ba016b75cfcfec4fc8b2b01cc4eca7e2bcc60
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20241108173851.436-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg29718.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>