Another hangup bugfix from Juha:

Another hangup bugfix from Juha:
 Problem 1 is that the config entry hangup flag is zeroed only at
 CONNECT_ACTIVE_IND in msghdl.c. If any (other) call is disconnected
 after EV_MDO and before CONNECT_ACTIVE_IND, the cleanup routine will
 disconnect the in-progress dialout as well, if its hangup flag is
 nonzero (which it is likely to be) after the previous incarnation of the
 cfg entry. Patch-1 fixes this by clearing the hangup flag as soon as a
 cfg entry is reserved for the call.

Submitted by:	Juha-Matti Liukkonen <jml@cubical.fi>