[krbdev.mit.edu #8025] krb5 gss_inquire_context doesn't work with partially established context

[Greg Hudson via RT]

RFC 2744 section 5.20 states "The caller must already have obtained a 
handle that refers to the context, although the context need not be fully 
established."  But krb5_gss_inquire_context errors out with 
GSS_S_NO_CONTEXT/KG_CTX_INCOMPLETE if the context is not established.  It 
shouldn't have this restriction.