document learn js and make getServer not require sf5

doc/source/netscript/advancedfunctions/getServer.rst

@@ -6,8 +6,6 @@ getServer() Netscript Function
     :RAM cost: 2 GB
     :param string hostname: Hostname of the server, defaults to host server.
 
-    If you are not in BitNode-5, then you must have Source-File 5-1 in order to run this function.
-
     This function is meant to be used in conjunction with the :doc:`formulas API<../netscriptformulasapi>`.
 
     Returns an object with the Server's stats. The object has the following properties::

doc/source/netscript/netscriptlearntoprogram.rst

@@ -15,6 +15,7 @@ help you learn some basic programming concepts.
 Here are some good tutorials for learning programming/JavaScript as a beginner:
 
 * `Learn-JS <http://www.learn-js.org/en/Welcome>`_
+* `programiz <https://www.programiz.com/javascript/get-started>`_
 * `Speaking JavaScript <http://speakingjs.com/es5/index.html>`_
    This is a bit on the longer side. You can skip all of the historical
    background stuff. Recommended chapters: 1, 7-18

src/NetscriptFunctions.ts

@@ -1579,9 +1579,6 @@ function NetscriptFunctions(workerScript: WorkerScript): NS {
     },
     getServer: function (ip: any): any {
       updateDynamicRam("getServer", getRamCost("getServer"));
-      if (SourceFileFlags[5] <= 0 && Player.bitNodeN !== 5) {
-        throw makeRuntimeErrorMsg("getServer", "Requires Source-File 5 to run.");
-      }
       const server = safeGetServer(ip, "getServer");
       const copy = Object.assign({}, server);
       // These fields should be hidden.