build-openssl: fix build with Visual Studio 2019

Reviewed-by: Marcel Raad
Contributed-by: osabc on github
Fixes #4188
Closes #4266

projects/build-openssl.bat

@@ -95,6 +95,19 @@ rem ***************************************************************************
       ) else (
         set "VC_PATH=Microsoft Visual Studio\2017\Community\VC"
       )
+    ) else if /i "%~1" == "vc14.2" (
+      set VC_VER=14.2
+      set VC_DESC=VC14.2
+
+      rem Determine the VC14.2 path based on the installed edition in descending
+      rem order (Enterprise, then Professional and finally Community)
+      if exist "%PF%\Microsoft Visual Studio\2019\Enterprise\VC" (
+        set "VC_PATH=Microsoft Visual Studio\2019\Enterprise\VC"
+      ) else if exist "%PF%\Microsoft Visual Studio\2019\Professional\VC" (
+        set "VC_PATH=Microsoft Visual Studio\2019\Professional\VC"
+      ) else (
+        set "VC_PATH=Microsoft Visual Studio\2019\Community\VC"
+      )
     ) else if /i "%~1%" == "x86" (
       set BUILD_PLATFORM=x86
     ) else if /i "%~1%" == "x64" (
@@ -202,6 +215,7 @@ rem ***************************************************************************
     if "%VC_VER%" == "12.0" set VCVARS_PLATFORM=amd64
     if "%VC_VER%" == "14.0" set VCVARS_PLATFORM=amd64
     if "%VC_VER%" == "14.1" set VCVARS_PLATFORM=amd64
+    if "%VC_VER%" == "14.2" set VCVARS_PLATFORM=amd64
   )
 
   if exist "%START_DIR%\ms\do_ms.bat" (
@@ -222,6 +236,8 @@ rem ***************************************************************************
     call "%ABS_VC_PATH%\bin\vcvars32"
   ) else if "%VC_VER%" == "14.1" (
     call "%ABS_VC_PATH%\Auxiliary\Build\vcvarsall" %VCVARS_PLATFORM%
+  ) else if "%VC_VER%" == "14.2" (
+    call "%ABS_VC_PATH%\Auxiliary\Build\vcvarsall" %VCVARS_PLATFORM%
   ) else (
     call "%ABS_VC_PATH%\vcvarsall" %VCVARS_PLATFORM%
   )
@@ -569,7 +585,7 @@ rem
         if not exist "%OUTDIR%\DLL Release" (
           mkdir "%OUTDIR%\DLL Release" 1>nul
         )
-  
+
         move !build_dir!\lib\*.lib "%OUTDIR%\DLL Release" 1>nul
         move !build_dir!\bin\*.dll "%OUTDIR%\DLL Release" 1>nul
         move !build_dir!\bin\*.exe "%OUTDIR%\DLL Release" 1>nul
@@ -605,6 +621,7 @@ rem
   echo vc12      - Use Visual Studio 2013
   echo vc14      - Use Visual Studio 2015
   echo vc14.1    - Use Visual Studio 2017
+  echo vc14.2    - Use Visual Studio 2019
   echo.
   echo Platform:
   echo.