program: increase port scan limit from 10 to 100 (#3780)
program: increase port scan limit from 10 to 100 (#3780)

Increase the port scanning limit from 10 to 100 so that more users can
start TensorBoard processes with default parameters in multi-tenant
notebook environments.

See https://github.com/tensorflow/tensorboard/issues/3752 for more
context.

tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard