[PATCH] chg: make timeout adjustable

[Jun Wu]

Excerpts from Yuya Nishihara's message of 2016-06-15 22:27:40 +0900:
> Sounds like the default is too short. You can work around the problem, but
> we'd better change the default to 30 or 60 sec since the problem happened
> in production environment.

That's a good idea. 60 sounds like a good default. I will submit a patch
after fixing hgsvn test failures.