fixes typo in daemonization DEBUG message after fork: acknoledge -> acknowledge

Author: Yousif Masoud

sapi/fpm/fpm/fpm_unix.c

@@ -535,7 +535,7 @@ int fpm_unix_init_main() /* {{{ */
 						exit(FPM_EXIT_SOFTWARE);
 					} else {
 						if (readval == 1) {
-							zlog(ZLOG_DEBUG, "I received a valid acknoledge from the master process, I can exit without error");
+							zlog(ZLOG_DEBUG, "I received a valid acknowledge from the master process, I can exit without error");
 							fpm_cleanups_run(FPM_CLEANUP_PARENT_EXIT);
 							exit(FPM_EXIT_OK);
 						} else {