OpenVPN 1.5-beta10 released

OpenVPN 1.5-beta10 has been released with a number of important fixes for the
Windows version, and two changes to the crypto layer.

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OpenVPN on the Win2K platform has been showing problems in several areas due
to incompatibilities between XP and Win2K.  Since until recently I did not
have access to a Win2K system, I was unable to do real testing on the
platform, aside from getting email reports about problems.  Luckily, someone
has come forward and set up a VMWare Win2K virtual machine for me which I can
remotely access.  I'm confident this will bring the 1.5 beta series on Win2K
up to the same level of quality as on XP.

I believe I've fixed the outstanding issues on Win2K:

* The install now pops up a dialog box encouraging you to reboot.  While
rebooting is unnecessary on XP, it appears to be critical on Win2K.

* When --ifconfig is used, OpenVPN now gives a choice of 3 methods for setting
the IP address and subnet mask of the TAP-Win32 adapter, using the --ip-win32
option.  In beta8 and beta9, --ifconfig was hardwired to use the netsh option.
 My newly acquired remote access to a Win2K VM has shown me that netsh is
rather broken on Win2k and shouldn't be relied upon (though it works well on
XP).  So the default operation is now to use a little-known Windows API called
the "IP Helper API" to set the address.  This option, while not having ideal
semantics, appears to work consistently on both Win2K and XP.  The --ip-win32
option is fully documented on the man page which can be viewed on the web site.

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