asn1_decode_k.c (asn1_decode_kdc_req_body): If the authorization field

asn1_decode_k.c (asn1_decode_kdc_req_body): If the authorization field
	is not present, fill in the authorization data fields with all zeros.
	Don't set kvno (that's *key* version number, not *Kerberos* version
	number) to 5.

err2kerr.c (KRB5_KRB__ERROR2krb5_error): The e_data field wasn't being
	decoded when it should have been.

qbuf2data.c (qbuf2krb5_data): Set magic number field to zero.

tgrq2ktgrq.c (KRB5_KDC__REQ__BODY2krb5_kdc_req): Allow the service
	principal to be optional.

ktgrq2tgrq.c (krb5_kdc_req2KRB5_KDC__REQ__BODY): ditto

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@4536 dc483132-0cff-0310-8789-dd5450dbe970