Vendor dependencies with dep

vendor/github.com/pkg/sftp/packet-manager_legacy.go

@@ -0,0 +1,21 @@
+// +build !go1.8
+
+package sftp
+
+import "sort"
+
+// for sorting/ordering outgoing
+type responsePackets []responsePacket
+
+func (r responsePackets) Len() int           { return len(r) }
+func (r responsePackets) Swap(i, j int)      { r[i], r[j] = r[j], r[i] }
+func (r responsePackets) Less(i, j int) bool { return r[i].id() < r[j].id() }
+func (r responsePackets) Sort()              { sort.Sort(r) }
+
+// for sorting/ordering incoming
+type requestPacketIDs []uint32
+
+func (r requestPacketIDs) Len() int           { return len(r) }
+func (r requestPacketIDs) Swap(i, j int)      { r[i], r[j] = r[j], r[i] }
+func (r requestPacketIDs) Less(i, j int) bool { return r[i] < r[j] }
+func (r requestPacketIDs) Sort()              { sort.Sort(r) }