Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+                          ___       __ _ _ __ ___  ___ 
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+                        | (_  |___| (_| | | |  __/\__ \
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+
+
+                How to build c-ares using MSVC or Visual Studio
+               =================================================
+
+
+
+  How to build using MSVC from the command line
+  ---------------------------------------------
+
+  Open a command prompt window and ensure that the environment is properly
+  set up in order to use MSVC or Visual Studio compiler tools.
+
+  Change to c-ares source folder where Makefile.msvc file is located and run:
+
+  > nmake -f Makefile.msvc
+
+  This will build all c-ares libraries as well as three sample programs.
+
+  Once the above command has finished a new folder named MSVCXX will exist
+  below the folder where makefile.msvc is found. The name of the folder
+  depends on the MSVC compiler version being used to build c-ares.
+
+  Below the MSVCXX folder there will exist four folders named 'cares',
+  'ahost', 'acountry', and 'adig'. The 'cares' folder is the one that
+  holds the c-ares libraries you have just generated, the other three
+  hold sample programs that use the libraries.
+
+  The above command builds four versions of the c-ares library, dynamic
+  and static versions and each one in release and debug flavours. Each
+  of these is found in folders named dll-release, dll-debug, lib-release,
+  and lib-debug, which hang from the 'cares' folder mentioned above. Each
+  sample program also has folders with the same names to reflect which
+  library version it is using.
+
+
+  How to install using MSVC from the command line
+  -----------------------------------------------
+
+  In order to allow easy usage of c-ares libraries it may be convenient to
+  install c-ares libraries and header files to a common subdirectory tree.
+
+  Once that c-ares libraries have been built using procedure described above,
+  use same command prompt window to define environment variable INSTALL_DIR
+  to designate the top subdirectory where installation of c-ares libraries and
+  header files will be done.
+
+  > set INSTALL_DIR=c:\c-ares
+
+  Afterwards, run following command to actually perform the installation:
+
+  > nmake -f Makefile.msvc install
+
+  Installation procedure will copy c-ares libraries to subdirectory 'lib' and
+  c-ares header files to subdirectory 'include' below the INSTALL_DIR subdir.
+
+  When environment variable INSTALL_DIR is not defined, installation is done
+  to c-ares source folder where Makefile.msvc file is located.
+
+
+  How to build using Visual Studio 6 IDE
+  --------------------------------------
+
+  A VC++ 6.0 reference workspace (vc6aws.dsw) is available within the 'vc'
+  folder to allow proper building of the library and sample programs.
+
+  1) Open the vc6aws.dsw workspace with MSVC6's IDE.
+  2) Select 'Build' from top menu.
+  3) Select 'Batch Build' from dropdown menu.
+  4) Make sure that the sixteen project configurations are 'checked'.
+  5) Click on the 'Build' button.
+  6) Once the sixteen project configurations are built you are done.
+
+  Dynamic and static c-ares libraries are built in debug and release flavours,
+  and can be located each one in its own subdirectory, dll-debug, dll-release,
+  lib-debug and lib-release, all of them below the 'vc\cares' subdirectory.
+
+  In the same way four executable versions of each sample program are built,
+  each using its respective library. The resulting sample executables are
+  located in its own subdirectory, dll-debug, dll-release, lib-debug and
+  lib-release, below the 'vc\acountry', 'vc\adig' and 'vc\ahost'folders.
+
+  These reference VC++ 6.0 configurations are generated using the dynamic CRT.
+
+
+  How to build using Visual Studio 2003 or newer IDE
+  --------------------------------------------------
+
+  First you have to convert the VC++ 6.0 reference workspace and project files
+  to the Visual Studio IDE version you are using, following next steps:
+
+  1) Open vc\vc6aws.dsw with VS20XX.
+  2) Allow VS20XX to update all projects and workspaces.
+  3) Save ALL and close VS20XX.
+  4) Open vc\vc6aws.sln with VS20XX.
+  5) Select batch build, check 'all' projects and click 'build' button.
+
+  Same comments relative to generated files and folders as done above for
+  Visual Studio 6 IDE apply here.
+
+
+  Relationship between c-ares library file names and versions
+  -----------------------------------------------------------
+
+  c-ares static release library version files:
+
+      libcares.lib -> static release library
+
+  c-ares static debug library version files:
+
+      libcaresd.lib -> static debug library
+
+  c-ares dynamic release library version files:
+
+      cares.dll -> dynamic release library
+      cares.lib -> import library for the dynamic release library
+      cares.exp -> export file for the dynamic release library
+
+  c-ares dynamic debug library version files:
+
+      caresd.dll -> dynamic debug library
+      caresd.lib -> import library for the dynamic debug library
+      caresd.exp -> export file for the dynamic debug library
+      caresd.pdb -> debug symbol file for the dynamic debug library
+
+
+  How to use c-ares static libraries
+  ----------------------------------
+
+  When using the c-ares static library in your program, you will have to
+  define preprocessor symbol CARES_STATICLIB while building your program,
+  otherwise you will get errors at linkage stage.
+
+
+Have Fun!
+