New MSVC property sheet for Multi-threaded XPDEV builds and usage:

defines XPDEV_THREAD_SAFE (not currently used in Windows builds) and
LINK_LIST_THREADSAFE (notice the inconsistent use of underscore :-)
Use of this property sheet fixes the problem with the terminal server global
variable 'uptime' getting corrupted when jsrt_GetNew() called listInit() from
js_rtpool.c which didn't #include sbbs.h and therefore had a different idea
about the size of link_list_t and thus corrupted the global data region
(zeroing out the 'uptime' variable, probably amonst other important things).

src/sbbs3/ftpsrvr.vcxproj

@@ -38,6 +38,7 @@
     <Import Project="..\..\3rdp\win32.release\mozjs\mozjs.props" />
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -48,6 +49,7 @@
     <Import Project="..\..\3rdp\win32.release\mozjs\mozjs.props" />
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>

src/sbbs3/mailsrvr.vcxproj

@@ -38,6 +38,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -48,6 +49,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>

src/sbbs3/sbbs.vcxproj

@@ -39,6 +39,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -50,6 +51,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>

src/sbbs3/services.vcxproj

@@ -38,6 +38,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -48,6 +49,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>

src/sbbs3/websrvr.vcxproj

@@ -38,6 +38,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -48,6 +49,7 @@
     <Import Project="..\comio\comio.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\build\target_ia32.props" />
+    <Import Project="..\xpdev\xpdev_mt.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>