Utilities/Release: Build Windows and OS X binaries with native SSL

For the nightly binaries, turn of CMAKE_USE_OPENSSL on Windows and OS X
10.6+ platforms.  This will activate the new curl behavior to use the
OS-native SSL/TLS implementation.

Utilities/Release/dash2win64_release.cmake

@@ -7,8 +7,13 @@ set(CPACK_BINARY_GENERATORS "NSIS ZIP")
 set(CPACK_SOURCE_GENERATORS "ZIP")
 set(MAKE_PROGRAM "make")
 set(MAKE "${MAKE_PROGRAM} -j8")
+if(CMAKE_CREATE_VERSION STREQUAL "nightly")
+  set(CMAKE_USE_OPENSSL OFF)
+else()
+  set(CMAKE_USE_OPENSSL ON)
+endif()
 set(INITIAL_CACHE "CMAKE_BUILD_TYPE:STRING=Release
-CMAKE_USE_OPENSSL:BOOL=ON
+CMAKE_USE_OPENSSL:BOOL=${CMAKE_USE_OPENSSL}
 CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE
 CMAKE_Fortran_COMPILER:FILEPATH=FALSE
 CMAKE_GENERATOR:INTERNAL=Unix Makefiles

Utilities/Release/dashmacmini5_release.cmake

@@ -8,8 +8,13 @@ set(MAKE "${MAKE_PROGRAM} -j5")
 set(CPACK_BINARY_GENERATORS "DragNDrop TGZ TZ")
 set(CPACK_SOURCE_GENERATORS "TGZ TZ")
 set(CPACK_DMG_FORMAT "UDBZ") #build using bzip2 for smaller package size
+if(CMAKE_CREATE_VERSION STREQUAL "nightly")
+  set(CMAKE_USE_OPENSSL OFF)
+else()
+  set(CMAKE_USE_OPENSSL ON)
+endif()
 set(INITIAL_CACHE "
-CMAKE_USE_OPENSSL:BOOL=ON
+CMAKE_USE_OPENSSL:BOOL=${CMAKE_USE_OPENSSL}
 OPENSSL_CRYPTO_LIBRARY:FILEPATH=/Users/kitware/openssl-1.0.1g-install/lib/libcrypto.a
 OPENSSL_INCLUDE_DIR:PATH=/Users/kitware/openssl-1.0.1g-install/include
 OPENSSL_SSL_LIBRARY:FILEPATH=/Users/kitware/openssl-1.0.1g-install/lib/libssl.a