utils.c: *default_srv_config: change max_timeline_entries default to 50

Signed-off-by: Yonle <yonle@lecturify.net>

utils.c

@@ -26,7 +26,7 @@ static const char *default_srv_config = "{"
     "\"queue_retry_minutes\":  2,"
     "\"queue_retry_max\":      10,"
     "\"cssurls\":              [\"\"],"
-    "\"max_timeline_entries\": 128,"
+    "\"max_timeline_entries\": 50,"
     "\"timeline_purge_days\":  120,"
     "\"local_purge_days\":     0,"
     "\"admin_email\":          \"\","