X wcfs: py: log with data and time present

So that we can correlage py log with go log.

Tried to mimic glog format output, but it is not exactly the same currently

wcfs/__init__.py

@@ -735,7 +735,10 @@ def main():
 
     # setup log.warn/error to go to stderr, so that details could be seen on
     # e.g. "fuse_unmount: ... failed (more details logged)"
-    logging.basicConfig(stream=sys.stderr, level=logging.WARNING)
+    logging.basicConfig(stream=sys.stderr, level=logging.WARNING,
+            # FIXME -> LMMDD hh:mm:ss.ssssss  tid file:line]
+            format="%(levelname)s %(asctime)s  %(process)d %(filename)s:%(lineno)d] %(name)s: %(message)s",
+            datefmt="%m%d %H:%M:%S")
 
     if cmd == "serve":
         if argv[0] == '-h':