X Sgo: turn on sha1 compute on - so that all neo/ tests are passing

null:00   ; oid=0..16995  nread=68269354  t=815.489603ms (47.981µs / object)  x=zsha1.go
null:00   ; oid=0..16995  nread=68269354  t=809.428095ms (47.624µs / object)  x=zsha1.go
null:00   ; oid=0..16995  nread=68269354  t=815.088024ms (47.957µs / object)  x=zsha1.go
null:00   ; oid=0..16995  nread=68269354  t=803.725121ms (47.289µs / object)  x=zsha1.go

go/neo/server/storage.go

@@ -22,7 +22,7 @@ package server
 
 import (
 	"context"
-	//"crypto/sha1"
+	"crypto/sha1"
 	"fmt"
 	"sync"
 	"time"
@@ -520,7 +520,7 @@ func (stor *Storage) serveClient1(ctx context.Context, req neo.Msg) (resp neo.Ms
 
 			Compression:	false,
 			Data:		buf,
-			//Checksum:	sha1.Sum(buf.Data),	// XXX computing every time
+			Checksum:	sha1.Sum(buf.Data),	// XXX computing every time
 
 			// XXX .NextSerial
 			// XXX .DataSerial