Anna Shaleva d68f57b9f9 rpc: avoid panic on double-call to *WSClient.Close() ... Although it's the caller's duty to avoid WSClient re-closing, we still can handle it. Fixes the following neofs-node error: ``` panic: close of closed channel goroutine 98 [running]: github.com/nspcc-dev/neo-go/pkg/rpc/client.(*WSClient).Close(...) github.com/nspcc-dev/neo-go@v0.98.3-pre.0.20220321144433-3b639f518ebb/pkg/rpc/client/wsclient.go:120 github.com/nspcc-dev/neofs-node/pkg/morph/subscriber.(*subscriber).Close(0x13) github.com/nspcc-dev/neofs-node/pkg/morph/subscriber/subscriber.go:108 +0x29 github.com/nspcc-dev/neofs-node/pkg/morph/event.listener.Stop(...) github.com/nspcc-dev/neofs-node/pkg/morph/event/listener.go:573 created by github.com/nspcc-dev/neofs-node/pkg/innerring.(*Server).Stop github.com/nspcc-dev/neofs-node/pkg/innerring/innerring.go:285 +0x12f ```		2022-05-07 11:59:55 +03:00
..
client	rpc: avoid panic on double-call to *WSClient.Close()	2022-05-07 11:59:55 +03:00
request	rpc: add Rules signer scope to request parameters	2022-03-03 12:18:19 +03:00
response	rpc/storage: add storage changes to invoke* diagnostics	2022-01-19 00:02:19 +03:00
server	*: remove io/ioutil uses	2022-03-17 19:39:18 +03:00
rpc_config.go	rpc: add server-side NEP-11 tracking API	2021-11-19 12:58:46 +03:00