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.
Merge topic 'nightly-binary-updates' into next

86d0e016 Utilities/Release: Build Windows and OS X binaries with native SSL
Utilities/Release: Fix name of OS X 10.6+ x86_64-only binary

In commit v3.1.0-rc1~52^2 (Make the OSX 10.6+ release x86_64 only,
2014-09-29) we forgot to remove the name "universal" from the binary
name.  Drop it now since the binary is no longer universal.

While at it, update the deployment target to actually be 10.6.
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.
Merge topic 'nightly-binary-updates' into next

fb3db9f8 Utilities/Release: Build Windows and OS X binaries with native SSL
c3d032f4 Utilities/Release: Fix name of OS X 10.6+ x86_64-only binary