Minor improvements

- WebFinger:  detect when to use http or https, better function naming
- RequestPool: add user agent

source/webfinger.d

@@ -18,11 +18,15 @@ private bool checkValidWebfingerResponse(Response rs) {
   return AcceptedWebfingerContentType.canFind(rs.responseHeaders()["content-type"].split(";")[0]);
 }
 
-PRequest buildRequest(string uri, string[string] params) {
+private PRequest buildRequest(string uri, string[string] params) {
   PRequest rq = PRequest();
+  string schema = "https";
+
+  if (uri.startsWith("localhost"))
+    schema = "http";
 
   rq.method = "GET";
-  rq.url = format("https://%s/.well-known/webfinger", uri);
+  rq.url = format("%s://%s/.well-known/webfinger", schema, uri);
   rq.headers["Accept"] = AcceptedWebfingerContentType;
 
   QueryParam[] p;
@@ -41,8 +45,8 @@ PRequest buildAcctRequest(string uri, string acct) {
   return buildRequest(uri, params);
 }
 
-JSONValue requestAcct(string uri, string acct) {
-  Response rs = RP.request(buildAcctRequest(uri, acct), true);
+JSONValue wfRequestAccount(string uri, string acct) {
+  Response rs = Rp.request(buildAcctRequest(uri, acct), true);
 
   if (checkValidWebfingerResponse(rs) == false)
     throw new Exception("Invalid webfinger response");
@@ -50,11 +54,8 @@ JSONValue requestAcct(string uri, string acct) {
   return parseJSON(rs.responseBody().toString());
 }
 
-JSONValue requestAcct(string handle) {
-  string uri, acct;
+JSONValue wfRequestAccount(string handle) {
+  string[] uriAcct = handle.split("@")[$ - 2 .. $];
 
-  uri = handle.split("@")[$ - 1];
-  acct = handle.split("@")[$ - 2];
-
-  return requestAcct(uri, acct);
+  return wfRequestAccount(uriAcct[1], uriAcct[0]);
 }