Do not set the buffer size by default but rely on the operation system default.

Do not set the buffer size by default but rely on the operation system default.

Also remove SOCKET_SND_RCV_BUF_MAX since limiting the buffer to 1000k is
arbitrary and all OSes impose a maximum that can be set anyway.

closes trac ticket #461

V2: SOCKET_SND_RCV_BUF_MAX removal

Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1444919918-4525-1-git-send-email-arne@rfc2549.org>
URL: http://article.gmane.org/gmane.network.openvpn.devel/10280

Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit f0b64e5dc00f35e3b0fe8c53a316ee74c9cbf15f)