ICU update to 54 - step 6

source/data/sprep/spreplocal.mk

+# *   Copyright (C) 2011, International Business Machines
+# *   Corporation and others.  All Rights Reserved.
+# A list of txt's to build
+#
+#  * To add an additional locale to the list:
+#    _____________________________________________________
+#    |  SPREP_SOURCE_LOCAL =   myStringPrep.txt ...
+#
+#  * To REPLACE the default list and only build a subset of files:
+#    _____________________________________________________
+#    |  SPREP_SOURCE = rfc4518.txt
+#
+# Chromium: Drop all the stringprep files including RFC 3491 for IDNA 2003.
+# ICU supports UTS 46 (IDNA2003, transition, and IDNA 2008), but Chromium
+# does not use IDNA 2003 any more and uses transitional/IDNA 2008 for which
+# a separate resource (uts46.nrm) is used. Therefore, we can drop rfc3491 as
+# well.
+# If we ever need to support other stringprep (e.g. LDAP, XMPP, SASL),
+# we have to add back the corresponding prep files.
+# rfc3491 : stringprep profile for IDN 2003
+# rfc3530 : NFS
+# rfc3722 : String Profile for Internet Small Computer
+#           Systems Interface (iSCSI) Names
+# rfc3920 : XMPP (Extensible Messaging and Presence Protocol)
+# rfc4011 : Policy Based Management Information Base, SNMP
+# rfc4013 : SASLprep: Stringprep Profile for User Names and Passwords
+# rfc4505 :  Anonymous Simple Authentication and Security Layer (SASL) Mechanism
+# rfc4518 : LDAP  Internationalized String Preparation
+#
+SPREP_SOURCE =