feat: add config replication fields to myconf_t, cluster_t, ha_state_t, persist_t; create byteorder.h

src/include/byteorder.h

@@ -0,0 +1,18 @@
+#pragma once
+/* Portable be64toh() for non-glibc or pre-2.25 targets. */
+#if defined(__linux__)
+#  include <endian.h>
+#elif defined(__APPLE__)
+#  include <machine/endian.h>
+#  include <libkern/OSByteOrder.h>
+#  define be64toh(x) OSSwapBigToHostInt64(x)
+#else
+#  include <stdint.h>
+static inline uint64_t be64toh(uint64_t x) {
+#  if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+    return __builtin_bswap64(x);
+#  else
+    return x;
+#  endif
+}
+#endif