client: Included openSSL error message for connection errors, fixed memory...

client: Included openSSL error message for connection errors, fixed memory leak when connection is closed while reading an RPC message.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2607 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534