Add "SYNC" icon (64x64, captured from GJ's "SYNCH" ANSI splash)

To replace lost the default/conio icon (for Windows builds) recently

src/sbbs3/scfg/resource.h

+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by scfg.rc
+//
+#define IDI_ICON1                       102
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        103
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif

src/sbbs3/scfg/scfg.vcxproj

@@ -257,7 +257,10 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <ResourceCompile Include="..\..\conio\ciolib.rc" />
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="scfg.rc" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">