[release/1.4.5] eth: add new RPC method (personal.) SignAndSendTransaction

(cherry picked from commit 64a6c2c1b6)

Conflicts:
	cmd/geth/js.go
	internal/web3ext/web3ext.go

eth/backend.go

@@ -26,6 +26,7 @@ import (
 	"path/filepath"
 	"regexp"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/ethereum/ethash"
@@ -113,6 +114,7 @@ type Ethereum struct {
 
 	// Handlers
 	txPool          *core.TxPool
+	txMu            sync.Mutex
 	blockchain      *core.BlockChain
 	accountManager  *accounts.Manager
 	pow             *ethash.Ethash
@@ -293,7 +295,7 @@ func (s *Ethereum) APIs() []rpc.API {
 		}, {
 			Namespace: "personal",
 			Version:   "1.0",
-			Service:   NewPrivateAccountAPI(s.accountManager),
+			Service:   NewPrivateAccountAPI(s),
 			Public:    false,
 		}, {
 			Namespace: "eth",