Fix Windows build: filedat.c now requires utf8.h

And a couple of projects didn't have the encode directory in their include path.

src/sbbs3/addfiles.vcxproj

@@ -39,6 +39,7 @@
     <Import Project="..\build\target_ia32.props" />
     <Import Project="..\hash\hash.props" />
     <Import Project="..\..\3rdp\win32.release\libarchive\libarchive.props" />
+    <Import Project="..\encode\encode.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" />
@@ -49,6 +50,7 @@
     <Import Project="..\build\target_ia32.props" />
     <Import Project="..\hash\hash.props" />
     <Import Project="..\..\3rdp\win32.release\libarchive\libarchive.props" />
+    <Import Project="..\encode\encode.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>

src/sbbs3/upgrade_to_v319.vcxproj

@@ -43,6 +43,7 @@
     <Import Project="..\hash\hash.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\..\3rdp\win32.release\libarchive\libarchive.props" />
+    <Import Project="..\encode\encode.props" />
   </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
@@ -51,6 +52,7 @@
     <Import Project="..\hash\hash.props" />
     <Import Project="..\build\undeprecate.props" />
     <Import Project="..\..\3rdp\win32.release\libarchive\libarchive.props" />
+    <Import Project="..\encode\encode.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">