IS_ONE_OF macro to make long chains of conditions more concise and easy to follow (#4860)

* Is one of macro

* Moar

* Whoops

* Trunk

* isOneOf function backed macro

src/meshUtils.h

@@ -1,5 +1,8 @@
 #pragma once
 #include "DebugConfiguration.h"
+#include <algorithm>
+#include <cstdarg>
+#include <iterator>
 #include <stdint.h>
 
 /// C++ v17+ clamp function, limits a given value to a range defined by lo and hi
@@ -17,4 +20,8 @@ char *strnstr(const char *s, const char *find, size_t slen);
 void printBytes(const char *label, const uint8_t *p, size_t numbytes);
 
 // is the memory region filled with a single character?
-bool memfll(const uint8_t *mem, uint8_t find, size_t numbytes);
+bool memfll(const uint8_t *mem, uint8_t find, size_t numbytes);
+
+bool isOneOf(int item, int count, ...);
+
+#define IS_ONE_OF(item, ...) isOneOf(item, sizeof((int[]){__VA_ARGS__}) / sizeof(int), __VA_ARGS__)