Split api.Headers.lexicographical_sorting in two and update the data (

mdn#22809)

I was investingating this feature in the course of creating a fetch feature in web-features. The data for Safari looked dubious. I soon found out that the two parts of this (sorting and combining) have different histories. Instead of using partial implementations, I split the feature in two.

The highlights here:

- Safari always supported both
- Edge acquired them separately
- Firefox got both at the same time, but later than reported

api/Headers.json

@@ -375,12 +375,12 @@
           }
         }
       },
-      "keys": {
+      "iterate_combined_duplicates": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/keys",
+          "description": "Iteration combines duplicate header names",
           "support": {
             "chrome": {
-              "version_added": "42"
+              "version_added": "57"
             },
             "chrome_android": "mirror",
             "deno": {
@@ -390,15 +390,12 @@
               "version_added": "16"
             },
             "firefox": {
-              "version_added": "44"
+              "version_added": "57"
             },
             "firefox_android": "mirror",
             "ie": {
               "version_added": false
             },
-            "nodejs": {
-              "version_added": "18.0.0"
-            },
             "oculus": "mirror",
             "opera": "mirror",
             "opera_android": "mirror",
@@ -416,9 +413,9 @@
           }
         }
       },
-      "lexicographical_sorting": {
+      "iterate_lexicographically": {
         "__compat": {
-          "description": "Lexicographical sorting, and values from duplicate header names combined when iterated.",
+          "description": "Iteration is lexicographically sorted",
           "support": {
             "chrome": {
               "version_added": "57"
@@ -427,9 +424,11 @@
             "deno": {
               "version_added": "1.0"
             },
-            "edge": "mirror",
+            "edge": {
+              "version_added": "18"
+            },
             "firefox": {
-              "version_added": "44"
+              "version_added": "57"
             },
             "firefox_android": "mirror",
             "ie": {
@@ -439,8 +438,49 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
+              "version_added": "10.1"
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror"
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
+      "keys": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/keys",
+          "support": {
+            "chrome": {
+              "version_added": "42"
+            },
+            "chrome_android": "mirror",
+            "deno": {
+              "version_added": "1.0"
+            },
+            "edge": {
+              "version_added": "16"
+            },
+            "firefox": {
+              "version_added": "44"
+            },
+            "firefox_android": "mirror",
+            "ie": {
               "version_added": false
             },
+            "nodejs": {
+              "version_added": "18.0.0"
+            },
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": "10.1"
+            },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": "mirror"