Bump to 6.0.43, use go generate

Also moved fetching of JSON information to Go for cross-OS usage.

fields/6.0.43/Account.json

@@ -0,0 +1,9 @@
+{
+  "name": "^[^\"' ]+$",
+  "x_password": "",
+  "vlan": "[2-9]|[1-9][0-9]{1,2}|[1-3][0-9]{3}|400[0-9]|^$",
+  "ip":"^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$|^$",
+  "tunnel_config_type": "vpn|802.1x|custom",
+  "tunnel_type": "[1-9]|1[0-3]|^$",
+  "tunnel_medium_type": "[1-9]|1[0-5]|^$"
+}