pull up r18878 from trunk

pull up r18878 from trunk

 r18878@cathode-dark-space:  tlyu | 2006-11-30 15:46:32 -0500
 ticket: 4955
 tags: pullup

 	* src/lib/krb5/krb/gc_frm_kdc.c: Also do style cleanup.
 	(krb5_get_cred_from_kdc_opt): If server principal was rewritten,
 	fall back unless it was rewritten to a TGS principal.  This fixes
 	a bug when a MS AD rewrites the service principal into a
 	single-component NETBIOS-style name. If we get a referral back to
 	the immediately preceding realm, fall back to non-referral
 	handling.  This fixes the changepw failure.  To prevent memory
 	leaks, when falling back to non-referral handling, free any tgts
 	previously obtained by the initial non-referral do_traversal()
 	call.

ticket: 4955
version_fixed: 1.6

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@18880 dc483132-0cff-0310-8789-dd5450dbe970