popn: allow game to launch on PCs with only one monitor (#633)

## Link to GitHub Issue or related Pull Request, if one exists
#618 

## Description of change
The game insists on having two monitors. Hook various DX9 and Win32
monitor APIs to fake a monitor if the user only has one. This correctly
convinces the game that it needs to draw two screens instead of just
one.

## Testing
WIP

src/spice2x/util/sysutils.cpp

@@ -559,7 +559,7 @@ namespace sysutils {
             // if there is one preferred by the user, use this one, and hide others
             log_info(
                 "sysutils",
-                "returning second monitor, {} @ index {} (-sysutilssubmonitor)",
+                "returning second monitor, {} @ index {} (-iidxsubmonitor / -sdvxsubmonitor)",
                 lpDisplayDevice->DeviceName,
                 iDevNum);
             return result_orig;