Wifi reliability (#45)

* First pass at wifi inbound FSA
* Fixup detector loop
* Remove asyncBanned
Unused, uninitialized
* Move wifi setup loop out of .ino
Wifi auto detect Serial 1,2,3
* Correct capitalization
* Uno compiles clean
* Command distributor
Moved command execution routing out of Wifi code for future use by Ethernet interface.
Co-authored-by: Fred <fndecker@gmail.com>

CommandDistributor.cpp

@@ -0,0 +1,54 @@
+#include <Arduino.h>
+#include "CommandDistributor.h"
+#include "WiThrottle.h"
+
+DCCEXParser * CommandDistributor::parser=0; 
+
+bool  CommandDistributor::parse(byte clientId,byte * buffer, Print * streamer) {
+  
+
+   // SIDE EFFECT WARNING:::
+  //  We know that parser will read the entire buffer before starting to write to it.
+  //  Otherwise we would have to copy the buffer elsewhere and RAM is in short supply.
+
+
+  bool closeAfter=false;
+  // Intercept HTTP requests
+  if (isHTTP(buffer)) {
+    if (httpCallback) httpCallback(streamer, buffer);
+    closeAfter = true;
+  }
+  else if (buffer[0] == '<')  {
+    if (!parser) parser = new DCCEXParser();
+    parser->parse(streamer, buffer, true); // tell JMRI parser that ACKS are blocking because we can't handle the async
+  }
+  else WiThrottle::getThrottle(clientId)->parse(*streamer, buffer);
+
+  return closeAfter;
+}
+
+bool CommandDistributor::isHTTP(byte * buffer) {
+
+  // POST GET PUT PATCH DELETE
+  // You may think a simple strstr() is better... but not when ram & time is in short supply
+  switch (buffer[0]) {
+    case 'P':
+      if (buffer[1] == 'U' && buffer[2] == 'T' && buffer[3] == ' ' ) return true;
+      if (buffer[1] == 'O' && buffer[2] == 'S' && buffer[3] == 'T' && buffer[4] == ' ') return true;
+      if (buffer[1] == 'A' && buffer[2] == 'T' && buffer[3] == 'C' && buffer[4] == 'H' && buffer[5] == ' ') return true;
+      return false;
+    case 'G':
+      if (buffer[1] == 'E' && buffer[2] == 'T' && buffer[3] == ' ' ) return true;
+      return false;
+    case 'D':
+      if (buffer[1] == 'E' && buffer[2] == 'L' && buffer[3] == 'E' && buffer[4] == 'T' && buffer[5] == 'E' && buffer[6] == ' ') return true;
+      return false;
+    default:
+      return false;
+  }
+}
+
+void CommandDistributor::setHTTPCallback(HTTP_CALLBACK callback) {
+  httpCallback = callback;
+}
+HTTP_CALLBACK CommandDistributor::httpCallback=0;