OpenVPN 2.6.1 (64-bit)

What's new in this version:

- Aoid warning about missing braces when initialising key struct
- Fix unaligned access in auth-token
- Update LibreSSL to 3.7.0 in Github actions
- Add printing USAN stack trace on github actions
- Fix LibreSSL not building in Github Actions
- Add missing stdint.h includes in unit tests files
- Combine extra_tun/frame parameter of frame_calculate_payload_overhead
- Update the last sections in the man page to a be a bit less outdated
- Add building unit tests with mingw to github actions
- Revise the cipher negotiation info about OpenVPN3 in the man page
- Exit if a proper message instead of segfault on Android without management
- Use proper print format/casting when converting msg_channel handle
- Reduce initialisation spam from verb <= 3 and print summary instead
- Dynamic tls-crypt for secure soft_reset/session renegotiation
- Changes.rst: document removal of --keysize
- Windows: fix unused function setenv_foreign_option
- Windows: fix unused variables in delete_route_ipv6
- Windows: fix wrong printf format in x_check_status
- Windows: fix unused variable in win32_get_arch
- configure: enable DCO by default on FreeBSD/Linux
- Windows: fix signedness errors with recv/send
- configure: fix formatting of --disable-lz4 and --enable-comp-stub
- Get rid of unused 'bool tuntap_buffer' arguments.
- FreeBSD 12.x workaround for IPv6 ifconfig is needed on 12.4 as well
- preparing release 2.6.1
- options.c: enforce a minimal fragment size
- configure: improve FreeBSD DCO check
- dco: define OVPN_DEL_PEER_REASON_TRANSPORT_DISCONNECT on FreeBSD
- Allow certain DHCP options to be used without DHCP server
- dco-win: use proper calling convention on x86
- Improve format specifier for socket handle in Windows
- Disable DCO if proxy is set via management
- Add logging for windows driver selection process
- Avoid management log loop with verb >= 6
- make dist: Ship ovpn_dco_freebsd.h, too
- block-dns using iservice: fix a potential double free
- Conditionally add subdir-objects option to automake
- Build unit tests in mingw Windows build
- cyryptapi.c: log the selected certificate's name
- cryptoapi.c: remove pre OpenSSL-3.01 support
- cryptoapi.c: simplify parsing of thumbprint hex string
- Option --cryptoapicert: support issuer name as a selector
- Add a unit test for functions in cryptoapi.c
- Do not save pointer to 'struct passwd' returned by getpwnam etc.