OpenVPN v2.4.0 release

David Sommerseth (5):
      dev-tools: Added script for updating copyright years in files
      Update copyrights
      docs: Further enhance the documentation related to SWEET32
      man: Remove references to no longer present IV_RGI6 peer-info
      build: Ensure Changes.rst is shipped and installed as a doc file

Gert Doering (1):
      Remove IV_RGI6=1 peer-info signalling.

Steffan Karger (3):
      Document that RSA_SIGN can also request TLS 1.2 signatures
      man: encourage user to read on about --tls-crypt
      Textual fixes for Changes.rst