security fix : buffer overflow with remote code execution in client if server sends more than 512 bytes without CRLF at the beginning of a reply
various fixes for axis2 http clients :
* AXIS2C-1568 : attempt to reconnect if keep-alive enabled in case of connection time out on server side
* actually read SO_TIMEOUT param from axis2.xml and use it
* fix disabling of keep-alive in axis2.xml which was broken : PROTOCOL == HTTP/1.0 and Keep-Alive == false should now work !