/** The key of the configuration. e.g. elevateword */
    String ONLINE_HELP_NAME_ELEVATEWORD = "online.help.name.elevateword";

    /** The key of the configuration. e.g. reqheader */
    String ONLINE_HELP_NAME_REQHEADER = "online.help.name.reqheader";

    /** The key of the configuration. e.g. synonym */
    String ONLINE_HELP_NAME_DICT_SYNONYM = "online.help.name.dict.synonym";

	peerMaxHeaderListSize  uint64
	peerMaxHeaderTableSize uint32
	initialWindowSize      uint32

	// reqHeaderMu is a 1-element semaphore channel controlling access to sending new requests.
	// Write to reqHeaderMu to lock it, read from it to unlock.
	// Lock reqmu BEFORE mu or wmu.
	reqHeaderMu chan struct{}

	// wmu is held while writing.