OpenVPN v2.5_beta2 release

2020.08.26 -- Version 2.5_beta2

Arne Schwabe (1):
      Fix client's poor man NCP fallback

Eric Thorpe (1):
      Fixes a bug in management_callback_send_cc_message, should be strlen instead of sizeof

Gert Doering (2):
      Fix stack overflow in OpenSolaris NEXTADDR()
      Workaround FreeBSD 12+ race condition on tun/tap open with IPv6.

Lev Stipakov (1):
      tun.c: enable using wintun driver under SYSTEM

Magnus Kroken (2):
      doc: fix typos in cipher-negotiation.rst
      Changes.rst: fix mistyped option names

Selva Nair (1):
      Improve the documentation for --dhcp-option