There is serious bug in handling requests in AATV module of AA_FORK
and AA_FREPLAY types in Merit AAA server. If AATV module not
responding for a long time main server drops original request without
cleaning some critical information (process counter aatv->proc_cnt).
As a result after some definite number of timeouts server stops
responding.
PR: 23212
Submitted by: Andriy I Pilipenko <bamby@marka.net.ua>