serve: catch and log all Exceptions, not only StandardException

Other exceptions than StandardExceptions were left to the default error handler
which was muted when running in daemon mode.

Now all Exceptions are handled and logged to the log file.

mercurial/hgweb/server.py

@@ -68,7 +68,7 b' class _httprequesthandler(BaseHTTPServer'
     def do_POST(self):
         try:
             self.do_write()
-        except StandardError:
+        except Exception:
             self._start_response("500 Internal Server Error", [])
             self._write("Internal Server Error")
             tb = "".join(traceback.format_exception(*sys.exc_info()))