chore!(amneziawg): refactor to be separate from wireguard

- amneziawg is now a VPN protocol and no longer a Wireguard implementation
- Use it with VPN_TYPE=amneziawg
- document AMNEZIAWG_* options in Dockerfile
- document amneziawg support in readme
- separate amneziawg settings and code from wireguard
- re-use code from wireguard whenever possible

internal/vpn/wireguard_test.go

@@ -40,24 +40,6 @@ func Test_buildWireguardSettings(t *testing.T) {
 				PersistentKeepaliveInterval: ptrTo(time.Hour),
 				Interface:                   "wg1",
 				MTU:                         ptrTo(uint32(1000)),
-				AmneziaWG: settings.AmneziaWg{
-					JunkPacketCount: ptrTo(uint16(1)),
-					JunkPacketMin:   ptrTo(uint16(0)),
-					JunkPacketMax:   ptrTo(uint16(0)),
-					PaddingS1:       ptrTo(uint16(0)),
-					PaddingS2:       ptrTo(uint16(0)),
-					PaddingS3:       ptrTo(uint16(0)),
-					PaddingS4:       ptrTo(uint16(0)),
-					HeaderH1:        ptrTo("x"),
-					HeaderH2:        ptrTo(""),
-					HeaderH3:        ptrTo(""),
-					HeaderH4:        ptrTo(""),
-					InitPacketI1:    ptrTo(""),
-					InitPacketI2:    ptrTo(""),
-					InitPacketI3:    ptrTo(""),
-					InitPacketI4:    ptrTo(""),
-					InitPacketI5:    ptrTo(""),
-				},
 			},
 			ipv6Supported: false,
 			settings: wireguard.Settings{
@@ -76,10 +58,6 @@ func Test_buildWireguardSettings(t *testing.T) {
 				RulePriority:                101,
 				IPv6:                        ptrTo(false),
 				MTU:                         1000,
-				AmneziaWG: wireguard.AmneziaSettings{
-					JunkPacketCount: 1,
-					HeaderH1:        "x",
-				},
 			},
 		},
 	}