Merge pull request #7200 from titouanc/fix-redis6-uclibc

make struct user anonymous (only typedefed) in server.h

src/server.h

@@ -732,7 +732,7 @@ typedef struct readyList {
                                            no AUTH is needed, and every
                                            connection is immediately
                                            authenticated. */
-typedef struct user {
+typedef struct {
     sds name;       /* The username as an SDS string. */
     uint64_t flags; /* See USER_FLAG_* */