connect: Do not fail if the connect is in progress.

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit a48711ae7e)

src/connect.c

@@ -383,7 +383,7 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
     }
 
     rc = connect(s, itr->ai_addr, itr->ai_addrlen);
-    if (rc == -1) {
+    if (rc == -1 && (errno != EINPROGRESS)) {
       ssh_set_error(session, SSH_FATAL,
           "Failed to connect: %s", strerror(errno));
       ssh_connect_socket_close(s);