add catchall system & http pc server

- define a catchall name to run globally or per service
- catchall must be javascript, but not necessarily a .js file
- catchall can request async mode
- catchall will catch any non-existing requests under its directory
- see wtv-flashrom:/content/content-serve.js as an example, which will catch wtv-flashrom:/content/ URLs.

- http pc: sends HTTP/1.0 to PC clients
- can be disabled with `pc_server_hidden_service_enabled`: false
- can change servicevault path by changing string of pc_server_hidden_service
- get.js in default PC service vault to get any WTV Url on the service

zefie_wtvp_minisrv/ServiceVault/http_pc/get.js

@@ -0,0 +1,37 @@
+if (request_headers.query.url) {
+    if (request_headers.query.url.indexOf(":/") > 0) {
+        var service_request = request_headers.query.url.split(":/")[0];
+        var service_port = 0;
+        Object.keys(minisrv_config.services).forEach(function (k) {
+            if (minisrv_config.services[k].disabled) return;
+            if (k == service_request) service_port = minisrv_config.services[k].port;
+        });
+        if (service_port > 0) {
+            request_is_async = true;
+            var request_headers_out = new Array()
+            request_headers_out.request = "GET " + request_headers.query.url;
+            request_headers_out.request_url = request_headers.query.url;
+            request_headers_out['wtv-client-serial-number'] = socket.id + "HTTPPCReq";
+            processURL(socket, request_headers_out);
+/*
+ var s = require('net').Socket();
+            var outdata = "";
+            s.connect(service_port);
+            s.setTimeout(1, function () {
+                outdata = outdata.split()
+                sendToClient(socket,outdata);
+            });
+            s.on('data', function (data) {
+                outdata += data;
+            });
+            s.write()
+*/
+        }
+    }
+}
+
+if (!headers) {
+    var errpage = doErrorPage(500)
+    headers = errpage[0];
+    data = errpage[1];
+}