The `deps/openssl/config/generate_headers.pl` imports `Text::Template`
but that Perl module is not present in the default Perl installation in
the Dockerfile and needs to be explicitly installed.

Newer versions of OpenSSL now throws an error if an engine is loaded
twice by its absolute path (a second load by its id appears to be okay).

This updates all sources in deps/openssl/openssl by:
    $ git clone git@github.com:quictls/openssl.git
    $ cd openssl
    $ cd ../node/deps/openssl
    $ rm -rf openssl
    $ cp -R ../openssl openssl
    $ rm -rf openssl/.git* openssl/.travis*
    $ git add --all openssl
    $ git commit openssl

After an OpenSSL source update, all the config files need to be
regenerated and committed by:
    $ make -C deps/openssl/config
    $ git add deps/openssl/config/archs
    $ git add deps/openssl/openssl
    $ git commit