[PATCH 3 of 3] chg: detect chg started by chg

[Jun Wu]

On 02/26/2016 01:21 PM, Yuya Nishihara wrote:
> and the client can't overwrite CHGMARK because it may be set by
> user.

If the user sets it, chg client will just abortmsg. I will make the name
longer and look more internal.