Request Entity Too Large. SSL buffer

Encountered a problem with apache post limits / ssl buffer size with client side certificates.

HTTP error: Request Entity Too Large

Apache Error Log: "request body exceeds maximum size for SSL buffer"

I found a working solution that can be added to a .htaccess file:
SSLRenegBufferSize 10486000
From:
http://forum.joomla.org/viewtopic.php?p=2085574