net: use icu's punycode implementation

ICU has a punycode implementation built in. Use it instead of the
javascript implementation because it's much faster.

PR-URL: https://github.com/nodejs/node/pull/7355
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

tools/icu/icu-generic.gyp

@@ -37,8 +37,7 @@
              'defines': [
                 # ICU cannot swap the initial data without this.
                 # http://bugs.icu-project.org/trac/ticket/11046
-                'UCONFIG_NO_LEGACY_CONVERSION=1',
-                'UCONFIG_NO_IDNA=1',
+                'UCONFIG_NO_LEGACY_CONVERSION=1'
              ],
           }],
         ],
@@ -428,9 +427,6 @@
           #'<(icu_path)/source/common/ubidi_props_data.h',
           # and the callers
           '<(icu_path)/source/common/ushape.cpp',
-          '<(icu_path)/source/common/usprep.cpp',
-          '<(icu_path)/source/common/uts46.cpp',
-          '<(icu_path)/source/common/uidna.cpp',
         ]}],
         [ 'icu_ver_major == 57', { 'sources!': [
           # work around http://bugs.icu-project.org/trac/ticket/12451
@@ -447,9 +443,6 @@
           #'<(icu_path)/source/common/ubidi_props_data.h',
           # and the callers
           '<(icu_path)/source/common/ushape.cpp',
-          '<(icu_path)/source/common/usprep.cpp',
-          '<(icu_path)/source/common/uts46.cpp',
-          '<(icu_path)/source/common/uidna.cpp',
         ]}],
         [ 'OS == "solaris"', { 'defines': [
           '_XOPEN_SOURCE_EXTENDED=0',

tools/icu/icu_small.json

@@ -24,7 +24,7 @@
     "region": "none",
     "zone": "locales",
     "converters": "none",
-    "stringprep": "none",
+    "stringprep": "locales",
     "translit": "none",
     "brkfiles": "none",
     "brkdict": "none",
@@ -34,7 +34,6 @@
   "remove": [
     "cnvalias.icu",
     "postalCodeData.res",
-    "uts46.nrm",
     "genderList.res",
     "brkitr/root.res",
     "unames.icu"