output/httpd: move buffer to stack

src/output/plugins/httpd/HttpdInternal.hxx

@@ -141,11 +141,6 @@ private:
 	boost::intrusive::list<HttpdClient,
 			       boost::intrusive::constant_time_size<true>> clients;
 
-	/**
-	 * A temporary buffer for the ReadPage() function.
-	 */
-	std::byte buffer[32768];
-
 	/**
 	 * The maximum number of clients connected at the same time.
 	 */

src/output/plugins/httpd/HttpdOutputPlugin.cxx

@@ -157,6 +157,8 @@ HttpdOutput::ReadPage() noexcept
 		unflushed_input = 0;
 	}
 
+	std::byte buffer[32768];
+
 	size_t size = 0;
 	do {
 		size_t nbytes = encoder->Read(buffer + size,