When the semantics of timout in htmllib (and the other libraries) were
discussed, the community approved the following behaviour:

- setdefaulttimeout() was a hack to allow to set the timeout when
nothing else is available.

- Now that you can pass the timeout when creating the connection, you
shouldn't use the default setting.

So, as to enhance practicality and ease to use, when you pass a timeout
value it will set up the timeout in the socket. When you don't pass
anything, or pass None, it will not set anything. And if you set
previously a default value, you can not override it through this
parameter: you shouldn't been setting the default in first place.

Regards,