config: memsys read-write; restart: not a warning

* `memsys` is already one of the restart-required sections
* when starting up, we re-initiate the cluster map to accept joins
* (and then compare)

Signed-off-by: Alex Aizman <alex.aizman@gmail.com>

ais/htrun.go

@@ -1821,7 +1821,9 @@ func (h *htrun) isIntraCall(hdr http.Header, fromPrimary bool) (err error) {
 		}
 		// we still trust the request when the sender's Smap is more current
 		if callerVer > smap.version() {
-			glog.Errorf("%s: %s < %s-Smap(v%s) - proceeding anyway...", h.si, smap, callerName, callerSver)
+			if h.ClusterStarted() {
+				glog.Errorf("%s: %s < %s-Smap(v%s) - proceeding anyway...", h.si, smap, callerName, callerSver)
+			}
 			runtime.Gosched()
 			return
 		}

cmn/config.go

@@ -530,12 +530,12 @@ type (
 		MinPctFree     int          `json:"min_pct_free"`
 	}
 	MemsysConfToUpdate struct {
-		MinFree        *cos.Size     `json:"min_free,omitempty" list:"readonly"`
+		MinFree        *cos.Size     `json:"min_free,omitempty"`
 		DefaultBufSize *cos.Size     `json:"default_buf,omitempty"`
 		SizeToGC       *cos.Size     `json:"to_gc,omitempty"`
 		HousekeepTime  *cos.Duration `json:"hk_time,omitempty"`
-		MinPctTotal    *int          `json:"min_pct_total,omitempty" list:"readonly"`
-		MinPctFree     *int          `json:"min_pct_free,omitempty" list:"readonly"`
+		MinPctTotal    *int          `json:"min_pct_total,omitempty"`
+		MinPctFree     *int          `json:"min_pct_free,omitempty"`
 	}
 
 	TCBConf struct {