[PATCH] Error out if we can not connect to a target LDAP server in classicupgrade

[Andrew Bartlett]

This makes this fatal condition much easier to diagnose, as
classicupgrade is a very noisy script. 

Please review/push.

Thanks,

Andrew Bartlett
-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org

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