Rewrite identd

- Use gio (which is cross platform)
- Properly support multiple users
- Allow configuring port
- Allow other plugins overriding

src/common/common.vcxproj.filters

@@ -29,9 +29,6 @@
     <ClInclude Include="history.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="identd.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
     <ClInclude Include="ignore.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -110,6 +107,9 @@
     <ClInclude Include="marshal.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="plugin-identd.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="cfgfiles.c">
@@ -127,9 +127,6 @@
     <ClCompile Include="history.c">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="identd.c">
-      <Filter>Source Files</Filter>
-    </ClCompile>
     <ClCompile Include="ignore.c">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -187,6 +184,9 @@
     <ClCompile Include="marshal.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="plugin-identd.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\win32\config.h.tt" />