[Minor] Fix another deinit race

src/controller.c

@@ -3942,8 +3942,10 @@ start_controller_worker (struct rspamd_worker *worker)
 
 	g_hash_table_unref (ctx->plugins);
 	g_hash_table_unref (ctx->custom_commands);
+
+	struct rspamd_http_context *http_ctx = ctx->http_ctx;
 	REF_RELEASE (ctx->cfg);
-	rspamd_http_context_free (ctx->http_ctx);
+	rspamd_http_context_free (http_ctx);
 	rspamd_log_close (worker->srv->logger, TRUE);
 
 	exit (EXIT_SUCCESS);

src/fuzzy_storage.c

@@ -3235,8 +3235,9 @@ start_fuzzy (struct rspamd_worker *worker)
 		rspamd_keypair_cache_destroy (ctx->keypair_cache);
 	}
 
+	struct rspamd_http_context *http_ctx = ctx->http_ctx;
 	REF_RELEASE (ctx->cfg);
-	rspamd_http_context_free (ctx->http_ctx);
+	rspamd_http_context_free (http_ctx);
 	rspamd_log_close (worker->srv->logger, TRUE);
 
 	exit (EXIT_SUCCESS);

src/rspamd_proxy.c

@@ -2213,8 +2213,9 @@ start_rspamd_proxy (struct rspamd_worker *worker)
 		rspamd_stat_close ();
 	}
 
+	struct rspamd_http_context *http_ctx = ctx->http_ctx;
 	REF_RELEASE (ctx->cfg);
-	rspamd_http_context_free (ctx->http_ctx);
+	rspamd_http_context_free (http_ctx);
 	rspamd_log_close (worker->srv->logger, TRUE);
 
 	exit (EXIT_SUCCESS);

src/worker.c

@@ -703,8 +703,9 @@ start_worker (struct rspamd_worker *worker)
 	rspamd_worker_block_signals ();
 
 	rspamd_stat_close ();
+	struct rspamd_http_context *http_ctx = ctx->http_ctx;
 	REF_RELEASE (ctx->cfg);
-	rspamd_http_context_free (ctx->http_ctx);
+	rspamd_http_context_free (http_ctx);
 	rspamd_log_close (worker->srv->logger, TRUE);
 
 	exit (EXIT_SUCCESS);