add 'sync' to --help

diff --git a/modules/lmdbbackend/lmdbbackend.cc b/modules/lmdbbackend/lmdbbackend.cc
index 1c3bdc7155b5468b175a1ccc4ac3d87ac238f9ef..db40143f55ccd334a0e68f7aa2552e60c7c78d20 100644 (file)
--- a/modules/lmdbbackend/lmdbbackend.cc
+++ b/modules/lmdbbackend/lmdbbackend.cc
@@ -1591,7 +1591,7 @@ public:
   void declareArguments(const string &suffix="")
   {
     declare(suffix,"filename","Filename for lmdb","./pdns.lmdb");
-    declare(suffix,"sync-mode","Synchronisation mode: nosync, nometasync, mapasync","mapasync");
+    declare(suffix,"sync-mode","Synchronisation mode: nosync, nometasync, mapasync, sync","mapasync");
     // there just is no room for more on 32 bit
     declare(suffix,"shards","Records database will be split into this number of shards", (sizeof(long) == 4) ? "2" : "64"); 
   }