Always exit and don't try to recover

The current code tries to recover from dropped connections and resets the
pcu state so it can keep running. However, this never worked correctly
which is why the -e option is used. This option exits the pcu as soon as
the internal state needs to be reset.

This patch removes this option and makes this behaviour default.

Ticket: SYS#390
Sponsored-by: On-Waves ehf
diff --git a/src/sysmo_sock.cpp b/src/sysmo_sock.cpp
index 2e2d9d3..951653e 100644
--- a/src/sysmo_sock.cpp
+++ b/src/sysmo_sock.cpp
@@ -112,12 +112,8 @@
 		gprs_rlcmac_tbf::free_all(&bts->trx[trx]);
 	}
 
-	gprs_bssgp_destroy_or_exit();
-
-	if (lost) {
-		state->timer.cb = pcu_sock_timeout;
-		osmo_timer_schedule(&state->timer, 5, 0);
-	}
+	gprs_bssgp_destroy();
+	exit(0);
 }
 
 static int pcu_sock_read(struct osmo_fd *bfd)