Don't decode arbitrary %2e during URL parsing after all

This reverts commit 47d2089 and also updates setter tests that were added later.

See whatwg/url#87 for discussion and whatwg/url#156 for the URL Standard PR.

Author: annevk

url/setters_tests.json

@@ -952,8 +952,8 @@
             "href": "view-source+http://example.net/home?lang=fr#nav",
             "new_value": "\\a\\%2E\\b\\%2e.\\c",
             "expected": {
-                "href": "view-source+http://example.net/\\a\\.\\b\\..\\c?lang=fr#nav",
-                "pathname": "/\\a\\.\\b\\..\\c"
+                "href": "view-source+http://example.net/\\a\\%2E\\b\\%2e.\\c?lang=fr#nav",
+                "pathname": "/\\a\\%2E\\b\\%2e.\\c"
             }
         },
         {
@@ -966,12 +966,12 @@
             }
         },
         {
-            "comment": "Bytes already percent-encoded are left as-is, except %2E.",
+            "comment": "Bytes already percent-encoded are left as-is, including %2E outside dotted segments.",
             "href": "http://example.net",
             "new_value": "%2e%2E%c3%89té",
             "expected": {
-                "href": "http://example.net/..%c3%89t%C3%A9",
-                "pathname": "/..%c3%89t%C3%A9"
+                "href": "http://example.net/%2e%2E%c3%89t%C3%A9",
+                "pathname": "/%2e%2E%c3%89t%C3%A9"
             }
         },
         {

url/urltestdata.json

@@ -1845,30 +1845,30 @@
   {
     "input": "http://example.com/foo/%2e%2",
     "base": "about:blank",
-    "href": "http://example.com/foo/.%2",
+    "href": "http://example.com/foo/%2e%2",
     "origin": "http://example.com",
     "protocol": "http:",
     "username": "",
     "password": "",
     "host": "example.com",
     "hostname": "example.com",
     "port": "",
-    "pathname": "/foo/.%2",
+    "pathname": "/foo/%2e%2",
     "search": "",
     "hash": ""
   },
   {
     "input": "http://example.com/foo/%2e./%2e%2e/.%2e/%2e.bar",
     "base": "about:blank",
-    "href": "http://example.com/..bar",
+    "href": "http://example.com/%2e.bar",
     "origin": "http://example.com",
     "protocol": "http:",
     "username": "",
     "password": "",
     "host": "example.com",
     "hostname": "example.com",
     "port": "",
-    "pathname": "/..bar",
+    "pathname": "/%2e.bar",
     "search": "",
     "hash": ""
   },
@@ -2286,15 +2286,15 @@
   {
     "input": "http://www/foo%2Ehtml",
     "base": "about:blank",
-    "href": "http://www/foo.html",
+    "href": "http://www/foo%2Ehtml",
     "origin": "http://www",
     "protocol": "http:",
     "username": "",
     "password": "",
     "host": "www",
     "hostname": "www",
     "port": "",
-    "pathname": "/foo.html",
+    "pathname": "/foo%2Ehtml",
     "search": "",
     "hash": ""
   },