chg: change default connect timeout to 60 seconds

As discussed at
https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-June/085290.html

The default 10-second timeout is not enough if the machine is overloaded.
Let's increase it to 60 seconds.

contrib/chg/README

@@ -29,4 +29,4 b' The following variables are available fo'
  * CHGDEBUG enables debug messages.
  * CHGSOCKNAME specifies the socket path of the background cmdserver.
  * CHGTIMEOUT specifies how many seconds chg will wait before giving up
-   connecting to a cmdserver. If it is 0, chg will wait forever. Default: 10
+   connecting to a cmdserver. If it is 0, chg will wait forever. Default: 60

contrib/chg/chg.c

@@ -250,7 +250,7 b' static hgclient_t *retryconnectcmdserver'
 
 	debugmsg("try connect to %s repeatedly", opts->sockname);
 
-	unsigned int timeoutsec = 10;  /* default: 10 seconds */
+	unsigned int timeoutsec = 60;  /* default: 60 seconds */
 	const char *timeoutenv = getenv("CHGTIMEOUT");
 	if (timeoutenv)
 		sscanf(timeoutenv, "%u", &timeoutsec);