[krbdev.mit.edu #8179] SAP logon with no credentials does not prompt for password

[Benjamin Kaduk via RT]

Instead of the expected behavior wherein attempting to initiate a GSS context causes a popup 
prompting the user to get kerberos tickets, we get an error message:

GSS-API(maj): Unspecified GSS failure.  Minor code may provi
GSS-API(min): Unknown code 0
Couldn't inquire DEFAULT INITIATING credentials

[...]
Return Code  -4
System Call gss_inquire_cred
counter 1


This seems to be present both in my proto-4.1 builds and in 4.0.1