I/O call is caused by an error condition, although a zero return
will normally mean that the connection was closed.
-If the port name is supplied as part of the host name then this will
+If the port name is supplied as part of the hostname then this will
override any value set with BIO_set_conn_port(). This may be undesirable
if the application does not wish to allow connection to arbitrary
ports. This can be avoided by checking for the presence of the ':'