Fix SSL in listen mode for BSD systems and others where a socket inherits its

non-blocking status from accept. A non-blocking socket makes SSL_accept fail if
we naively treat it like a blocking socket.

CHANGELOG

@@ -1,5 +1,10 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o [Ncat] SSL in listen mode was made to work on systems like BSD in
+  which a socket inherits its blocking of non-blocking status from the
+  listening socket. Thanks to Daniel Roethlisberger for reporting the
+  bug and providing test results. [David]
+
 o Rewrote the port list merging code in validate_scan_lists to be more
   maintainable [Josh Marlow]