Fix musl/Alpine build failures

JohnSully · JohnSully · commit b423e1050e27 · 2022-05-06T17:05:04.000Z
diff --git a/src/server.h b/src/server.h
@@ -1080,7 +1080,7 @@ class dict_iter : public dict_const_iter
     dict_iter()
         : dict_const_iter(nullptr)
     {}
-    explicit dict_iter(nullptr_t)
+    explicit dict_iter(std::nullptr_t)
         : dict_const_iter(nullptr)
     {}
     explicit dict_iter(dict *d, dictEntry *de)
