Bug#409360: openssh-client: Disabling GSSAPIAuthentication option by default

[Moritz Augustin <software@moritz-augustin.de>]

I would also like to see the option disabled by default, because I think most 
of the users dealing with Kerberos authentication issues know about the 
neccessary config parts.
People (like me) are wondering why connecting to local servers (without DNS) 
is that slow. 10 seconds per connection attempt.

It's not that it's not possible to change it (but you have to know how to 
debug ssh to get the error message which leads with a search engine to some 
users with the same problem. It's that it would be more comfortable to 
unexperienced users.