OpenVPN v2.3.15

2017.05.11 -- Version 2.3.15
David Sommerseth (6):
      dev-tools: Added script for updating copyright years in files
      Update copyrights
      docs: Further improve --reneg-bytes and SWEET32 information
      git: Merge .gitignore files into a single file
      Make --cipher/--auth none more explicit on the risks
      Prepare v2.3.15 release

Gert Doering (1):
      Document --proto udp6, tcp6, etc.

Julien Muchembled (1):
      Fix implicit declarations when HAVE_OPENSSL_ENGINE is unset

Steffan Karger (6):
      Add missing includes in error.h
      cleanup: merge packet_id_alloc_outgoing() into packet_id_write()
      Document that OpenVPN 2.3 does not check the CRL signature
      Introduce and use secure_memzero() to erase secrets
      Drop packets instead of assert out if packet id rolls over (CVE-2017-7479)
      Don't assert out on receiving too-large control packets (CVE-2017-7478)