stunnel: version up 4.45 to 4.46

ChangeLog entry :
* New features
  - Added Unix socket support (e.g. "connect = /var/run/stunnel/socket").
  - Added "verify = 4" mode to ignore CA chain and only verify peer certificate.
  - Removed the limit of 16 IP addresses for a single 'connect' option.
  - Removed the limit of 256 stunnel.conf sections in PTHREAD threading model.
    It is still not possible have more than 63 sections on WIN32 platform.
* Optimizations
  - Reduced per-connection memory usage.
  - Performed a major refactoring of internal data structures.  Extensive
    internal testing was performed, but some regression bugs are expected.
* Bugfixes
  - Fixed WIN32 compilation with Mingw32.
  - Fixed non-blocking API emulation layer in UCONTEXT threading model.
  - Fixed signal handling in UCONTEXT threading model.

component/stunnel/buildout.cfg

@@ -17,8 +17,8 @@ filename = stunnel-4-hooks.py
 
 [stunnel-4]
 recipe = hexagonit.recipe.cmmi
-url = http://mirror.bit.nl/stunnel/stunnel-4.45.tar.gz
-md5sum = dee104214a7c13593c1053cdff9a850f
+url = http://mirror.bit.nl/stunnel/stunnel-4.46.tar.gz
+md5sum = 978030ff42f087ec26eb8a095ab69994
 pre-configure-hook = ${stunnel-4-hook-download:location}/${stunnel-4-hook-download:filename}:pre_configure_hook
 configure-options =
   --enable-ipv6