improve plugin

src/scheduler/include/scheduler.h

@@ -60,7 +60,7 @@ typedef struct {
     uint64_t          nextid;
     xce_conf4sched_t* config;
     uint64_t          configver;
-    kvmgr_t           plugins;
+    var               plugins;
     void*             seqjob_allocator;
     void*             parjob_allocator;
     void*             affinity_allocator;