Make krb5_ucs2 an unsigned type.  Eliminate the need for distinguished
values for ucs2 and ucs4 characters by changing the API of the single-
character conversion routines.


https://github.com/krb5/krb5/commit/ee699ef91ba36719e50ce9dc5d54dd3896740917
Commit By: ghudson
Revision: 22350
Changed Files:
U   trunk/src/include/k5-utf8.h
U   trunk/src/lib/krb5/unicode/ucstr.c
U   trunk/src/util/support/utf8.c