CServer
 * must have connection thread in screen info map
    allows disconnect if screen map changes and screen is removed
 * put mutex locks wherever necessary (like accessing m_active)
 * must handle disconnect of screen by warping cursor off of it

CClient
 * need methods for screen event handler to call as appropriate

server						client
------						------
[accept]			<--		connect
challenge			-->		[encrypt]
[verify]			<--		response (encrypted challenge, client name)
hangup if invalid
query info			-->		
					<--		info (size)

...
enter (x,y)			-->
clipboard data		-->									optional
mouse/key events	-->									optional
query clipboard		-->									optional
					<--		clipboard data					(cont.)
leave				-->

...
grab clipboard		-->

... (on clipboard ownership stolen)
					<--		clipboard lost

... (on screen resize)
					<--		info (size)

... (on screen saver, primary screen)
saver (on/off)		-->

...
quit				-->
					<--		close

---
primary screen
	open
	close
	enter
	leave
	warp
	clipboard (get/set)
	screen saver (show/hide)
	queue events with server (including screen saver activation)

secondary screen
	open
	close
	enter
	leave
	warp
	synth mouse
	synth key
	clipboard (get/set)
	screen saver (show/hide)
	queue events with client (clipboard lost/changed, size change)

---
client:
	open
	close
	wait: server messages, clipboard taken, screen resize, quit

server:
	accept
		asynchronously accept new clients
	config
		asynchronously accept and handle config message (via HTTP)
	primary
		asynchronously handle primary screen events
	comm
		send/recv messages to/from clients

---
win32:
  double click support
  need to support window stations
    login screen on NT is a separate window station
  handle display changes

---
not sending VK_?WIN and VK_APPS.  possibly hotkeys being stolen.

VkKeyScan() doesn't get proper shift state unless we map shift
(etc?) to VK_SHIFT not VK_LSHIFT or VK_RSHIFT.

not handling international characters

X11 key translation (server)
  handle compose key?
   * don't send compose, don't send dead keys, send composed key?
   * send all keys, let client do compose