I've gotten this on two different GNU/Linux systems, one does not have
ssh-askpass installed, the other does but it is in /usr/libexec/openssh;
so does VC really require ssh-askpass directly in /usr/libexec?  If so,
I guess I could symlink it there, but this seems suboptimal.  Again, in
both systems 'git push' from the shell succeeded, so git itself seems to
be configured correctly and ssh-askpass doesn't seem to be required.  Or
is there some other reason for the failure in VC?

Steve Berman