msvc: update native windows build to use restinio

MSVC/build_vs2015_release_x64.bat

MSVC/contrib/src/argon2/argon2-uwp.patch

MSVC/contrib/src/argon2/fetch_and_patch.bat

MSVC/contrib/src/fetch_and_patch.bat

MSVC/contrib/src/gmp/fetch_and_patch.bat

MSVC/contrib/src/gmp/gmp-uwp.patch

MSVC/contrib/src/gnutls/fetch_and_patch.bat

MSVC/contrib/src/gnutls/gnutls-no-egd.patch

MSVC/contrib/src/gnutls/gnutls-uwp.patch

MSVC/contrib/src/gnutls/read-file-limits.h.patch

MSVC/contrib/src/iconv/fetch_and_patch.bat

MSVC/contrib/src/iconv/libiconv-uwp.patch

MSVC/contrib/src/msgpack/fetch_and_patch.bat

MSVC/contrib/src/msgpack/msgpack-uwp.patch

MSVC/contrib/src/nettle/fetch_and_patch.bat

MSVC/contrib/src/nettle/nettle-uwp.patch

MSVC/contrib/src/zlib/fetch_and_patch.bat

MSVC/contrib/src/zlib/zlib-uwp.patch

MSVC/fetch_deps.bat

MSVC/opendht.vcxproj