Merge remote-tracking branch 'lp-Com/iocsherr' into 7.0

* lp-Com/iocsherr:
  doc
  deprecate iocshFindCommand()
  iocshTest start
  iocshCmd() imply "on error break"
  iocsh more error handling
  iocsh handle redirect and similar early errors
  iocsh trap arg. parsing errors
  iocsh further on error
  Fixed logic errors and added some prompts.
  use iocshSetError()
  iocsh allow setting of error code
  iocsh control error behavior
  iocsh catch exceptions

# Conflicts:
#	documentation/RELEASE_NOTES.html

modules/database/src/tools/registerRecordDeviceDriver.pl

@@ -275,7 +275,7 @@ static const iocshFuncDef rrddFuncDef =
     {"$subname", 1, rrddArgs};
 static void rrddCallFunc(const iocshArgBuf *)
 {
-    $subname(*iocshPpdbbase);
+    iocshSetError($subname(*iocshPpdbbase));
 }
 
 } // extern "C"