Update reserved.json

I just feel like there are more reserved subdomains that need to be added. e.g. server, logout, signin, singout, organization,

util/reserved.json

@@ -29,6 +29,7 @@
     "doc",
     "documentation",
     "domain",
+    "domains",
     "email",
     "example",
     "file",
@@ -37,6 +38,7 @@
     "git",
     "github",
     "gitlab",
+    "google",
     "go",
     "help",
     "home",
@@ -110,6 +112,7 @@
     "status",
     "store",
     "subdomain",
+    "subdomains",
     "support",
     "sys",
     "system",
@@ -125,5 +128,26 @@
     "ww",
     "wwww",
     "your-domain-name",
-    "zone"
+    "your-subdomain",
+    "zone",
+    "organization",
+    "organizations",
+    "open",
+    "edu",
+    "server",
+    "mailbox",
+    "vpn",
+    "websocket",
+    "api-gateway",
+    "public",
+    "admin-panel",
+    "api-docs",
+    "metrics",
+    "signin",
+    "signup",
+    "logout",
+    "api-v1",
+    "api-v2",
+    "api-v3",
+    "devapi",
 ]