feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/missinggo/mime/mime.go

@@ -0,0 +1,18 @@
+package mime
+
+import "strings"
+
+type Type struct {
+	Class    string
+	Specific string
+}
+
+func (t Type) String() string {
+	return t.Class + "/" + t.Specific
+}
+
+func (t *Type) FromString(s string) {
+	ss := strings.SplitN(s, "/", 1)
+	t.Class = ss[0]
+	t.Specific = ss[1]
+}