Resolution switching without reconnecting.

- Based on https://github.com/jsorg71/xrdp/tree/dynamic_monitor
- Tested with xorgxrdp
- Tested with vnc
- Only works with single monitor.
- Update documentation to clarify the difference between MSTSC and
Microsoft Remote Desktop.
- Does not include compatibility with /gfx at this time, which is still
in testing.
- Updates to include ms-rdpedisp.h header for the 2.2.2 specification of
the protocol.
- Adds new dynamic_monitor_layout struct that shares the number of
monitors with xrdp_client_info.h
- Does not allow for BPP changes because the RDP protocol doesn't
support it.
- Option to disable feature as NeutrinoRDP doesn't support it (It was
based on FreeRDP 1.0.1 which didn't yet have this feature.)
- Add CLIENT_MONITOR_DATA_MAXIMUM_MONITORS constant and reference
spec definition.

Depends on https://github.com/neutrinolabs/xorgxrdp/pull/183

common/xrdp_client_info.h

@@ -19,6 +19,7 @@
  */
 
 #include "xrdp_constants.h"
+#include "ms-rdpbcgr.h"
 
 #if !defined(XRDP_CLIENT_INFO_H)
 #define XRDP_CLIENT_INFO_H
@@ -120,8 +121,8 @@ struct xrdp_client_info
     int security_layer; /* 0 = rdp, 1 = tls , 2 = hybrid */
     int multimon; /* 0 = deny , 1 = allow */
     int monitorCount; /* number of monitors detected (max = 16) */
-    struct monitor_info minfo[16]; /* client monitor data */
-    struct monitor_info minfo_wm[16]; /* client monitor data, non-negative values */
+    struct monitor_info minfo[CLIENT_MONITOR_DATA_MAXIMUM_MONITORS]; /* client monitor data */
+    struct monitor_info minfo_wm[CLIENT_MONITOR_DATA_MAXIMUM_MONITORS]; /* client monitor data, non-negative values */
 
     int keyboard_type;
     int keyboard_subtype;