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-ifdef::env-github[]
-:important-caption: :heavy_exclamation_mark:
-endif::[]
-
-= Building for TLS Support
-
-If you want to include support for Transport Layer Security
-(tls+tcp:// and wss:// URLs) you should follow these directions.
-
-At this time, TLS support depends on the https://tls.mbed.org/[Mbed TLS]
-library.
-
-IMPORTANT: Mbed TLS is licensed under different terms than NNG.
-You are responsible for reading those license terms, and ensuring
-that your use conforms to them.
-
-On many distributions you may be able to install a pre-packaged version
-of Mbed TLS. We recommend doing so if this is an option for you.
-For example, Ubuntu users can install the `libmbedtls-dev` package.
-
-You can also build Mbed TLS from source; if you choose to do so,
-please make sure you also *install* it somewhere (even a temporary
-staging directory). 
-
-== Configuring NNG with Mbed TLS
-
-TLS support is not enabled by default, but can be enabled by configuring
-with the CMake option `NNG_ENABLE_TLS=ON`.
-
-By default NNG searches for an installed copy of Mbed TLS in `/usr/local`,
-as well as the normal installation directories for libraries on your system.
-
-If you have installed Mbed TLS elsewhere, you can direct the NNG configuration
-to it by setting the `MBEDTLS_ROOT_DIR` CMake variable.
-
-== Example
-
-The following example would work on either Linux or macOS, and assumes
-that we have checked out github source trees into `$HOME/work`.
-It also assumes that Mbed TLS is already installed in /usr/local or
-a standard search path.
-
-[source, sh]
-----
-$ export NNGDIR=$HOME/work/nng
-$ mkdir build
-$ cd build
-
-$ cmake -DNNG_ENABLE_TLS=ON ..
-
-   ... (lots of lines of output from cmake...)
-
-$ make
-
-   ... (lots of lines of output from make...)
-
-$ ./tests/tls
-ok      ./tests/tls                                            1.503s
-
-----