[#131] client: keep backwards-compatibility, update README.md, fix chore

Signed-off-by: Egor Olefirenko <egor.olefirenko892@gmail.com>

README.md

@@ -42,7 +42,6 @@ Contains client for working with FrostFS.
 ```go
 var prmInit client.PrmInit
 prmInit.SetDefaultPrivateKey(key) // private key for request signing
-prmInit.DisableFrostFSFailuresResolution() // disable erroneous status parsing
 
 var c client.Client
 c.Init(prmInit)
@@ -78,7 +77,6 @@ these details to the user as well as retry an operation, possibly with different
 Status wire-format is extendable and each node can report any set of details it wants.
 The set of reserved status codes can be found in
 [FrostFS API](https://git.frostfs.info/TrueCloudLab/frostfs-api/src/branch/master/status/types.proto).
-Use `client.PrmInit.DisableFrostFSFailuresResolution()` to avoid returning erroneous statuses as Go built-in errors.
 
 ### policy
 Contains helpers allowing conversion of placing policy from/to JSON representation

client/client.go

@@ -161,6 +161,10 @@ func (x *PrmInit) SetDefaultPrivateKey(key ecdsa.PrivateKey) {
 	x.key = key
 }
 
+// Deprecated: method is no-op. Option is default.
+func (x *PrmInit) ResolveFrostFSFailures() {
+}
+
 // DisableFrostFSFailuresResolution makes the Client to preserve failure statuses of the
 // FrostFS protocol only in resulting structure (see corresponding Res* docs).
 // These errors are returned from each protocol operation. By default, statuses

client/netmap_test.go

@@ -67,6 +67,7 @@ func TestClient_NetMapSnapshot(t *testing.T) {
 	var res *ResNetMapSnapshot
 	var srv serverNetMap
 	c := newClient(&srv)
+	c.prm.DisableFrostFSFailuresResolution()
 	ctx := context.Background()
 
 	// request signature
@@ -84,7 +85,6 @@ func TestClient_NetMapSnapshot(t *testing.T) {
 	srv.signResponse = true
 
 	// status failure
-	c.prm.DisableFrostFSFailuresResolution()
 	res, err = c.NetMapSnapshot(ctx, prm)
 	require.NoError(t, err)
 	assertStatusErr(t, res)