Merged from branches/iakerb: add new asynchronous krb5_tkt_creds APIs,
which allow a caller to take responsibility for transporting requests
to the KDC and getting responses back.  Rewrite the existing
krb5_get_credentials API in terms of the new functions.  Get rid of
krb5_get_cred_from_kdc and friends, since they are no longer used.


https://github.com/krb5/krb5/commit/4472eed040cf442a504f24158f80242d6fbd94c2
Commit By: ghudson
Revision: 23900
Changed Files:
U   trunk/src/include/k5-int.h
U   trunk/src/include/krb5/krb5.hin
U   trunk/src/lib/krb5/krb/Makefile.in
D   trunk/src/lib/krb5/krb/gc_frm_kdc.c
U   trunk/src/lib/krb5/krb/get_creds.c
U   trunk/src/lib/krb5/krb/int-proto.h
U   trunk/src/lib/krb5/libkrb5.exports