Log Message:
openvpn: updated to 2.5.4

Overview of changes in 2.5.4
============================
Bugfixes
--------
- fix prompting for password on windows console if stderr redirection
  is in use - this breaks 2.5.x on Win11/ARM, and might also break
  on Win11/adm64 when released.

- fix setting MAC address on TAP adapters (--lladdr) to use sitnl
  (was overlooked, and still used "ifconfig" calls)

- various improvements for man page building (rst2man/rst2html etc)

- minor bugfix with IN6_IS_ADDR_UNSPECIFIED() use (breaks build on
  at least one platform strictly checking this)

- fix minor memory leak under certain conditions in add_route() and
  add_route_ipv6()

User-visible Changes
--------------------
- documentation improvements

- copyright updates where needed

- better error reporting when win32 console access fails

New features
------------
- also build man page on Windows builds