Log Message:
lang/erlang: Update to 21.3.6

Highlights from erlang 21.2 to 21.3:

    Kernel:
        The standard logger handler, logger_std_h, now has a new internal
        feature for log rotation. For full information see the documentation.

    SSL:
        The Reason part of the error return from the functions connect and
        handshake has a better and documented format. This is a potential
        incompatibility. See the documentation.
        Refactoring of state handling has improved the TLS application data
        throughput and reduced CPU overhead
        Code optimizations has reduced CPU load for encryption/decryption,
        especially for Erlang's distribution protocol over TLS
        Now supports active N

    Erl_interface:
        Support for plugin of a user supplied socket implementation has been added.

    OTP:
        The HTML reference documentation now shows the OTP version where
        modules and functions were first introduced. Versions of OTP older than \ 
R13B04 is not shown in the reference
        documentation