[Evolution] Failed logon due to server problem reports a password error

[Johannes <kingma bluewin ch>]

it seems the evolution-mapi reports a failed password when in fact the
server is not available. There is an importand difference between the
two. When a key ring stored password might still be correct it shouldn't
be asked again from the user. evolution-mapi should silently retry the
logon without bothering the user. Unless of course the password *is*
wrong. 

In my case evolution-mapi works fine inside the LAN but outside it
cannot connect to the server. The password does not change because of
that.