+ * Output a piece of content to the web browser using conformant HTTP and MIME semantics.
+ *
+ * If this function is called, it is expected that begin_burst() has already been called
+ * and some sort of content has been fed into the buffer. This function will transmit a
+ * bunch of headers to the client. end_burst() will add some headers of its own, and then
+ * transmit the buffered content to the client.