Update to 5.07. From the changelog:

Version 5.07, 2014.11.01, urgency: MEDIUM:
* New features
  - Several SMTP server protocol negotiation improvements.
  - Added UTF-8 byte order marks to stunnel.conf templates.
  - DH parameters are no longer generated by "make cert".
    The hardcoded DH parameters are sufficiently secure,
    and modern TLS implementations will use ECDH anyway.
  - Updated manual for the "options" configuration file option.
  - Added support for systemd 209 or later.
  - New --disable-systemd ./configure option.
  - setuid/setgid commented out in stunnel.conf-sample.
* Bugfixes
  - Added support for UTF-8 byte order mark in stunnel.conf.
  - Compilation fix for OpenSSL with disabled SSLv2 or SSLv3.
  - Non-blocking mode set on inetd and systemd descriptors.
  - shfolder.h replaced with shlobj.h for compatibility
    with modern Microsoft compilers.

Version 5.06, 2014.10.15, urgency: HIGH:
* Security bugfixes
  - OpenSSL DLLs updated to version 1.0.1j.
    https://www.openssl.org/news/secadv_20141015.txt
  - The insecure SSLv2 protocol is now disabled by default.
    It can be enabled with "options = -NO_SSLv2".
  - The insecure SSLv3 protocol is now disabled by default.
    It can be enabled with "options = -NO_SSLv3".
  - Default sslVersion changed to "all" (also in FIPS mode)
    to autonegotiate the highest supported TLS version.
* New features
  - Added missing SSL options to match OpenSSL 1.0.1j.
  - New "-options" commandline option to display the list
    of supported SSL options.
* Bugfixes
  - Fixed FORK threading build regression bug.
  - Fixed missing periodic Win32 GUI log updates.

Version 5.05, 2014.10.10, urgency: MEDIUM:
* New features
  - Asynchronous communication with the GUI thread for faster
    logging on Win32.
  - systemd socket activation (thx to Mark Theunissen).
  - The parameter of "options" can now be prefixed with "-"
    to clear an SSL option, for example:
    "options = -LEGACY_SERVER_CONNECT".
  - Improved "transparent = destination" manual page (thx to
    Vadim Penzin).
* Bugfixes
  - Fixed POLLIN|POLLHUP condition handling error resulting
    in prematurely closed (truncated) connection.
  - Fixed a null pointer dereference regression bug in the
    "transparent = destination" functionality (thx to
    Vadim Penzin). This bug was introduced in stunnel 5.00.
  - Fixed startup thread synchronization with Win32 GUI.
  - Fixed erroneously closed stdin/stdout/stderr if specified
    as the -fd commandline option parameter.
  - A number of minor Win32 GUI bugfixes and improvements.
  - Merged most of the Windows CE patches (thx to Pierre Delaage).
  - Fixed incorrect CreateService() error message on Win32.
  - Implemented a workaround for defective Cygwin file
    descriptor passing breaking the libwrap support:
    http://wiki.osdev.org/Cygwin_Issues#Passing_file_descriptors

Version 5.04, 2014.09.21, urgency: LOW:
* New features
  - Support for local mode ("exec" option) on Win32.
  - Support for UTF-8 config file and log file.
  - Win32 UTF-16 build (thx to Pierre Delaage for support).
  - Support for Unicode file names on Win32.
  - A more explicit service description provided for the
    Windows SCM (thx to Pierre Delaage).
  - TCP/IP dependency added for NT service in order to prevent
    initialization failure at boot time.
  - FIPS canister updated to version 2.0.8 in the Win32 binary
    build.
* Bugfixes
  - load_icon_default() modified to return copies of default icons
    instead of the original resources to prevent the resources
    from being destroyed.
  - Partially merged Windows CE patches (thx to Pierre Delaage).
  - Fixed typos in stunnel.init.in and vc.mak.
  - Fixed incorrect memory allocation statistics update in
    str_realloc().
  - Missing REMOTE_PORT environmental variable is provided to
    processes spawned with "exec" on Unix platforms.
  - Taskbar icon is no longer disabled for NT service.
  - Fixed taskbar icon initialization when commandline options are
    specified.
  - Reportedly more compatible values used for the dwDesiredAccess
    parameter of the CreateFile() function (thx to Pierre Delaage).
  - A number of minor Win32 GUI bugfixes and improvements.


(schmonz)