message: Document how to build libmongoc with TLS 1.1
diff: @@ -51,6 +51,11 @@ page.
  Follow the instructions for building from a tarball at
  [Installing libmongoc](http://mongoc.org/libmongoc/current/installing.html).
  +Industry best practices and some regulations require the use of TLS 1.1
  +or newer. The MongoDB C Driver supports TLS 1.1 on Linux if OpenSSL is
  +at least version 1.0.1. On OS X and Windows, the C Driver uses native
  +TLS implementations that support TLS 1.1.
  +
  If you need static C++ driver libraries and you are configuring the C
  driver with the `./configure` script, you must pass the `--enable-static`
  configure option when building libbson/libmongoc.
  