[cvsnt] Latest updates

[Tony Hoyle]

cvsnt 1.11.1.3 build 64

Basically the same as build 63, with some ssh updates.

Support ssh1 encrypted keys.
Support ssh agents (pageant, basically).

If you have multiple keys loaded into pageant it'll only use the first
one it finds...  Hopefully this won't be too much of a restriction.
It also always uses ssh2 in preference to ssh1 if it can (ssh2 is more
secure, anyway) but you can override this with the version= keyword.

Tony