Fix build: SD.h includes, enum/macro collisions (HEX/INPUT), usb_host string stub, BAUDS link

src/modules/messageforge.cpp

@@ -6,7 +6,7 @@
 // Understand any message format and generate valid protocol messages on the fly.
 
 class MessageForge : public Module {
-  enum Format { HEX, JSON, PROTOBUF, CUSTOM_BINARY, XML } format = HEX;
+  enum Format { FMT_HEX, JSON, PROTOBUF, CUSTOM_BINARY, XML } format = FMT_HEX;
   uint32_t messagesForged = 0;
   uint32_t payloadsInjected = 0;
   char lastMessage[128] = "00 01 02 03 04 05";
@@ -55,7 +55,7 @@ private:
   void craftMessage() {
     messagesForged++;
     switch (format) {
-      case HEX:
+      case FMT_HEX:
         strncpy(lastMessage, "48 65 6c 6c 6f 20 57 6f 72 6c 64", 127);
         say("HEX: crafted %lu byte message", (unsigned long)(messagesForged * 11));
         break;