ZF-7984: Sub-second timeouts are not supported
Sub one second timeouts are not supported, even in the case where the underlying adapter supports them.
For example, the stream_set_timeout() in Zend_Http_Client_Adapter_Socket's connect() method is called with:
stream_set_timeout($this->socket, (int) $this->config['timeout'])
Hence, the timeout value is cast to an integer even though stream_set_timeout itself supports sub-second timeouts with the $microseconds argument.