ci: add experimental test environment with LSPs installed

.appveyor.yml

@@ -70,17 +70,52 @@ environment:
         -DCMAKE_C_FLAGS=-m64
         -DCMAKE_CXX_FLAGS=-m64
 
+    - job: msvc-vs2013-x86-LSP
+      appveyor_build_worker_image: Visual Studio 2013
+      cmake_options: -G "Visual Studio 12 2013"
+      lsp: true
+      appveyor_save_cache_on_error: true
+
+    - job: msvc-vs2017-x64-LSP
+      appveyor_build_worker_image: Visual Studio 2017
+      cmake_options: -G "Visual Studio 15 2017 Win64"
+      lsp: true
+      appveyor_save_cache_on_error: true
+
+matrix:
+  allow_failures:
+  - lsp: true
+
 configuration: Debug
 
 clone_folder: c:\wepoll
 shallow_clone: true
 clone_depth: 1
 
+cache:
+  - c:\proxif
+
 init:
   - cmd: set
 
 install:
-  - ps: Install-Product node 'Current'
+  - ps: >-
+      Install-Product node 'Current'
+
+      if ($env:lsp) {
+        if (!(Test-Path c:\proxif\setup.exe)) {
+          $null = &mkdir -Force c:\proxif
+          Invoke-WebRequest -Uri http://www.proxifier.com/download/ProxifierSetup.exe -OutFile "c:\proxif\setup.exe"
+        }
+
+        Start-Process -Wait c:\proxif\setup.exe -ArgumentList /silent,/norestart
+
+        $catalog = &netsh winsock show catalog
+        echo $catalog
+        if (!($catalog -like "*Layered Chain Entry*")) {
+          throw "LSP not installed"
+        }
+      }
   - cmd: set path=%path:C:\Program Files\Git\usr\bin;=%
   - cmd: set path=%path%;%mingw_path%
   - cmd: set path=%path%;%vs_path%