o fixed clients that dont see server's beacon dont reconnect

o added config via EPICS_CA_MAX_SEARCH_PERIOD
o when successful search response arrives dont allow search period to get to long
o dont scan channels when searching to find lowest retry count as this doesnt change behavior and adds overhead

src/ca/nciu.cpp

@@ -191,7 +191,7 @@ void nciu::setServerAddressUnknown ( udpiiu & newiiu,
 {
     guard.assertIdenticalMutex ( this->cacCtx.mutexRef () );
     this->piiu = & newiiu;
-    this->retry = disconnectRetrySetpoint;
+    this->retry = 0;
     this->typeCode = USHRT_MAX;
     this->count = 0u;
     this->sid = UINT_MAX;
@@ -217,7 +217,7 @@ void nciu::accessRightsStateChange (
 /*
  * nciu::searchMsg ()
  */
-bool nciu::searchMsg ( udpiiu & iiu, unsigned & retryNoForThisChannel )
+bool nciu::searchMsg ( udpiiu & iiu )
 {
     caHdr msg;
     bool success;
@@ -238,7 +238,6 @@ bool nciu::searchMsg ( udpiiu & iiu, unsigned & retryNoForThisChannel )
         if ( this->retry < UINT_MAX ) {
             this->retry++;
         }
-        retryNoForThisChannel = this->retry;
     }
 
     return success;
@@ -516,15 +515,6 @@ void nciu::show (
     }
 }
 
-void nciu::beaconAnomalyNotify (
-    epicsGuard < epicsMutex > & guard ) 
-{
-    guard.assertIdenticalMutex ( this->cacCtx.mutexRef () );
-    if ( this->retry > beaconAnomalyRetrySetpoint ) {
-        this->retry = beaconAnomalyRetrySetpoint;
-    }
-}
-
 void nciu::ioCompletionNotify ( 
     epicsGuard < epicsMutex > &, class baseNMIU & io )
 {