Ticket History #6595: FAST (preauth framework) negotiation

Merge branches/fast-negotiate into trunk.
This implements http://k5wiki.kerberos.org/wiki/Projects/Fast_negotiation

Additional changes:
* krb5_c_make_checksum with checksum type 0 uses mandatory checksum for given key enctype

Conflicts:
src/lib/crypto/krb/make_checksum.c

https://github.com/krb5/krb5/commit/acd672680307a3f1bad828e6573fa34bd7779203
Commit By: hartmans
Revision: 23465
Changed Files:
U trunk/src/clients/kinit/kinit.c
U trunk/src/clients/klist/klist.c
U trunk/src/include/k5-int.h
U trunk/src/include/krb5/krb5.hin
U trunk/src/kdc/do_as_req.c
U trunk/src/kdc/do_tgs_req.c
U trunk/src/kdc/fast_util.c
U trunk/src/kdc/kdc_preauth.c
U trunk/src/kdc/kdc_util.c
U trunk/src/kdc/kdc_util.h
U trunk/src/lib/crypto/krb/make_checksum.c
U trunk/src/lib/krb5/asn.1/asn1_k_decode.c
U trunk/src/lib/krb5/asn.1/asn1_k_encode.c
U trunk/src/lib/krb5/asn.1/krb5_decode.c
U trunk/src/lib/krb5/ccache/ccapi/stdcc.c
U trunk/src/lib/krb5/ccache/ccfns.c
U trunk/src/lib/krb5/krb/fast.c
U trunk/src/lib/krb5/krb/fast.h
U trunk/src/lib/krb5/krb/get_in_tkt.c
U trunk/src/lib/krb5/krb/gic_opt.c
U trunk/src/lib/krb5/krb/init_creds_ctx.h
U trunk/src/lib/krb5/libkrb5.exports