[krbdev.mit.edu #6603] issues with SPNEGO

[Arlene Berry via RT]

Our code base is 1.7 with some elements such as S4U pulled in from 1.8.
When generating the diffs for you I took the changes, applied them to a
current copy of your trunk, and then generated the diffs from that as I
wasn't sure how well they would apply for you otherwise.  In our code
base acc_NegState is the seventh argument to init_sec_ctx and is an
OM_uint32 * but it looks like that's changed and I didn't catch it.