rdesktop 1.8.0

Set openssl and x11 include path explicitly for 10.9 support.
Compile error patch reported upstream: http://sourceforge.net/mailarchive/message.php?msg_id=31339514
1. On network error, return NULL rather than an empty return statement to conform with function signature.
2. SSL_OP_NO_COMPRESSION is only available for openssl ver >0.9.8 so check it before adding the flag.

drop previous pr #22116