metadata: split context to incoming and outgoing

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

go.mod

@@ -7,15 +7,15 @@ require (
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/ef-ds/deque v1.0.4
 	github.com/golang/protobuf v1.4.3
-	github.com/google/uuid v1.1.5
+	github.com/google/uuid v1.2.0
 	github.com/imdario/mergo v0.3.11
 	github.com/kr/text v0.2.0 // indirect
-	github.com/miekg/dns v1.1.35
+	github.com/miekg/dns v1.1.38
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
 	github.com/stretchr/testify v1.7.0
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad // indirect
-	golang.org/x/net v0.0.0-20201224014010-6772e930b67b
+	golang.org/x/net v0.0.0-20210119194325-5f4716e94777
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e // indirect
 	google.golang.org/protobuf v1.25.0
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect