comment adjustment

Author: freddy77

misc/appveyor.yml

@@ -67,7 +67,15 @@ configuration:
   - release
 
 install:
-  # win-iconv
+  # This is common block for setting up environment.
+  #
+  # Various generator environment variables are set.
+  # OpenSSL directory is set in OPENSSL_ROOT_DIR.
+  #
+  # CONFIG_DEBUG and CONFIG_RELEASE are set to either # "." or ".\<CONFIG-NAME>\".
+  # This allows the usage of CMD substring syntax.
+  #
+  # We use 3 generators: Ninja, NMake and Visual Studio projects.
   - ps: &setup |
      $ENV:WIDTH = $ENV:PLAT.Substring($ENV:PLAT.length - 2)
      if ($ENV:VS_VERSION -eq 2013) {
@@ -95,6 +103,7 @@ install:
          break
        }
      }
+  # win-iconv
   - appveyor DownloadFile https://github.com/FreeTDS/win-iconv/archive/%WIN_ICONV_VER%.zip
   - 7z x %WIN_ICONV_VER%.zip
   - ren win-iconv-%WIN_ICONV_VER% iconv