Merge pull request #3937 from jtattermusch/coapp_openssl

vsprojects/coapp/openssl/.gitignore

vsprojects/coapp/openssl/README.md

vsprojects/coapp/openssl/buildall.bat

vsprojects/coapp/openssl/grpc.dependencies.openssl.autopkg

vsprojects/coapp/openssl/libeay32.vcxproj

...sl/managed_targets/grpc.dependencies.openssl.redist.props

.../managed_targets/grpc.dependencies.openssl.redist.targets

vsprojects/coapp/openssl/openssl.sln

vsprojects/coapp/openssl/packages.config

vsprojects/coapp/openssl/ssleay32.vcxproj

vsprojects/coapp/openssl/version.inc

vsprojects/coapp/zlib/grpc.dependencies.zlib.autopkg