Merge branch 'tor-gitlab/mr/393' into maint-0.4.5

changes/bug40175

@@ -0,0 +1,5 @@
+  o Minor features (logging, diagnostic):
+    - Log decompression failures at a higher severity level, since they
+      can help provide missing context for other warning messages.
+      We rate-limit these messages, to avoid flooding the logs if they
+      begin to occur frequently. Closes ticket 40175.

src/feature/dirclient/dirclient.c

@@ -1959,7 +1959,9 @@ dir_client_decompress_response_body(char **bodyp, size_t *bodylenp,
   /* If we're pretty sure that we have a compressed directory, and
    * we didn't manage to uncompress it, then warn and bail. */
   if (!plausible && !new_body) {
-    log_fn(LOG_PROTOCOL_WARN, LD_HTTP,
+    const int LOG_INTERVAL = 3600;
+    static ratelim_t warning_limit = RATELIM_INIT(LOG_INTERVAL);
+    log_fn_ratelim(&warning_limit, LOG_WARN, LD_HTTP,
            "Unable to decompress HTTP body (tried %s%s%s, on %s).",
            description1,
            tried_both?" and ":"",