global: move to context (#1699)

* global: move to context

Move from golang.org/x/net/context to std lib's context.

Change done with:

for i in $(grep -l '/context' **/*.go); do sed -e 's|golang.org/x/net/context|context|' -i $i; echo $i; done
for i in **/*.go; do goimports -w $i; done

* drop from dns.pb.go as well

11 files changed, 22 insertions, 11 deletions

diff --git a/plugin/file/cname_test.go b/plugin/file/cname_test.go
index 1dcc491ae..8721cfed6 100644
--- a/plugin/file/cname_test.go
+++ b/plugin/file/cname_test.go
@@ -8,8 +8,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/upstream"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 func TestLookupCNAMEChain(t *testing.T) {
diff --git a/plugin/file/delegation_test.go b/plugin/file/delegation_test.go
index 0685cc513..e084e1c5a 100644
--- a/plugin/file/delegation_test.go
+++ b/plugin/file/delegation_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var delegationTestCases = []test.Case{
diff --git a/plugin/file/dname_test.go b/plugin/file/dname_test.go
index ebb0780a0..5e4f8be99 100644
--- a/plugin/file/dname_test.go
+++ b/plugin/file/dname_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 // RFC 6672, Section 2.2. Assuming QTYPE != DNAME.
diff --git a/plugin/file/dnssec_test.go b/plugin/file/dnssec_test.go
index eb6374b03..fb3ca05ab 100644
--- a/plugin/file/dnssec_test.go
+++ b/plugin/file/dnssec_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var dnssecTestCases = []test.Case{
diff --git a/plugin/file/ds_test.go b/plugin/file/ds_test.go
index 537d47def..645cdbd82 100644
--- a/plugin/file/ds_test.go
+++ b/plugin/file/ds_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var dsTestCases = []test.Case{
diff --git a/plugin/file/ent_test.go b/plugin/file/ent_test.go
index 124b4688b..558fe7d97 100644
--- a/plugin/file/ent_test.go
+++ b/plugin/file/ent_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var entTestCases = []test.Case{
diff --git a/plugin/file/file.go b/plugin/file/file.go
index d6804e124..1fd5737c1 100644
--- a/plugin/file/file.go
+++ b/plugin/file/file.go
@@ -9,8 +9,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/log"
 	"github.com/coredns/coredns/request"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 type (
diff --git a/plugin/file/glue_test.go b/plugin/file/glue_test.go
index bf523a90b..29744f043 100644
--- a/plugin/file/glue_test.go
+++ b/plugin/file/glue_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 // another personal zone (helps in testing as my secondary is NSD
diff --git a/plugin/file/lookup_test.go b/plugin/file/lookup_test.go
index dd922c1b6..d75157369 100644
--- a/plugin/file/lookup_test.go
+++ b/plugin/file/lookup_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var dnsTestCases = []test.Case{
diff --git a/plugin/file/wildcard_test.go b/plugin/file/wildcard_test.go
index b7cc67f53..e90f833e1 100644
--- a/plugin/file/wildcard_test.go
+++ b/plugin/file/wildcard_test.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
 	"github.com/coredns/coredns/plugin/test"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 var wildcardTestCases = []test.Case{
diff --git a/plugin/file/xfr.go b/plugin/file/xfr.go
index 4b74dd1e5..0ee985eb9 100644
--- a/plugin/file/xfr.go
+++ b/plugin/file/xfr.go
@@ -7,8 +7,9 @@ import (
 	"github.com/coredns/coredns/plugin/pkg/log"
 	"github.com/coredns/coredns/request"
 
+	"context"
+
 	"github.com/miekg/dns"
-	"golang.org/x/net/context"
 )
 
 // Xfr serves up an AXFR.