http://blogs.msdn.com/b/ieinternals/archive/2011/03/26/https-and-connection-close-is-your-apache-modssl-server-configuration-set-to-slow.aspx
for more information. Found by zawadaa.
# their broken HTTP/1.1 implementation. Use variables "downgrade-1.0" and
# "force-response-1.0" for this.
<IfModule mod_setenvif.c>
- BrowserMatch ".*MSIE.*" nokeepalive ssl-unclean-shutdown downgrade-1.0 force-response-1.0
+ BrowserMatch ".*MSIE [2-5]\..*" \ nokeepalive ssl-unclean-shutdown downgrade-1.0 force-response-1.0
</IfModule>
# Per-Server Logging: