Fix missing newlines in access logs for JS configuration

When using JS configuration for the "format" option, access log entries
were being written without newline characters. This commit adds the
missing newline character to each log entry.

Closes: #1458

src/nxt_router_access_log.c

@@ -65,7 +65,6 @@ nxt_int_t
 nxt_router_access_log_create(nxt_task_t *task, nxt_router_conf_t *rtcf,
     nxt_conf_value_t *value)
 {
-    u_char                        *p;
     nxt_int_t                     ret;
     nxt_str_t                     str;
     nxt_tstr_t                    *format;
@@ -121,18 +120,8 @@ nxt_router_access_log_create(nxt_task_t *task, nxt_router_conf_t *rtcf,
         nxt_memcpy(access_log->path.start, alcf.path.start, alcf.path.length);
     }
 
-    str.length = alcf.format.length + 1;
-
-    str.start = nxt_malloc(str.length);
-    if (str.start == NULL) {
-        nxt_alert(task, "failed to allocate log format structure");
-        return NXT_ERROR;
-    }
-
-    p = nxt_cpymem(str.start, alcf.format.start, alcf.format.length);
-    *p = '\n';
-
-    format = nxt_tstr_compile(rtcf->tstr_state, &str, NXT_TSTR_LOGGING);
+    format = nxt_tstr_compile(rtcf->tstr_state, &alcf.format,
+                              NXT_TSTR_LOGGING | NXT_TSTR_NEWLINE);
     if (nxt_slow_path(format == NULL)) {
         return NXT_ERROR;
     }