Add failing test case to reproduce the parse bug

Author: Woellchen

spec/fixtures/ifconfig_mac

@@ -1,14 +1,14 @@
 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
 	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
-	inet 127.0.0.1 netmask 0xff000000 
-	inet6 ::1 prefixlen 128 
-	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
+	inet 127.0.0.1 netmask 0xff000000
+	inet6 ::1 prefixlen 128
+	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
 	nd6 options=201<PERFORMNUD,DAD>
 gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
 stf0: flags=0<> mtu 1280
 en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 	options=400<CHANNEL_IO>
-	ether 64:5a:ed:ea:5c:81 
+	ether 64:5a:ed:ea:5c:81
 	inet 192.168.143.212 netmask 0xffffff00 broadcast 192.168.143.255
 	media: autoselect
 	status: active
@@ -23,17 +23,17 @@ en0.1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
 	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
 en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
 	options=460<TSO4,TSO6,CHANNEL_IO>
-	ether 82:17:0e:93:9d:00 
+	ether 82:17:0e:93:9d:00
 	media: autoselect <full-duplex>
 	status: inactive
 en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
 	options=460<TSO4,TSO6,CHANNEL_IO>
-	ether 82:17:0e:93:9d:01 
+	ether 82:17:0e:93:9d:01
 	media: autoselect <full-duplex>
 	status: inactive
 bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
-	ether 82:17:0e:93:9d:00 
+	ether 82:17:0e:93:9d:00
 	Configuration:
 		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
 		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
@@ -47,33 +47,39 @@ bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 	status: inactive
 p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
 	options=400<CHANNEL_IO>
-	ether 06:5a:ed:ea:5c:81 
+	ether 06:5a:ed:ea:5c:81
 	media: autoselect
 	status: inactive
 awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
 	options=400<CHANNEL_IO>
-	ether 2e:ba:e4:83:4b:b7 
-	inet6 fe80::2cba:e4ff:fe83:4bb7%awdl0 prefixlen 64 scopeid 0x9 
+	ether 2e:ba:e4:83:4b:b7
+	inet6 fe80::2cba:e4ff:fe83:4bb7%awdl0 prefixlen 64 scopeid 0x9
 	nd6 options=201<PERFORMNUD,DAD>
 	media: autoselect
 	status: active
 llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 	options=400<CHANNEL_IO>
-	ether 2e:ba:e4:83:4b:b7 
-	inet6 fe80::2cba:e4ff:fe83:4bb7%llw0 prefixlen 64 scopeid 0xa 
+	ether 2e:ba:e4:83:4b:b7
+	inet6 fe80::2cba:e4ff:fe83:4bb7%llw0 prefixlen 64 scopeid 0xa
 	nd6 options=201<PERFORMNUD,DAD>
 	media: aumm,l.j           hn toselect
 	status: active
 utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
-	inet6 fe80::ba29:a797:6aa:9eb%utun0 prefixlen 64 scopeid 0xb 
+	inet6 fe80::ba29:a797:6aa:9eb%utun0 prefixlen 64 scopeid 0xb
 	nd6 options=201<PERFORMNUD,DAD>
 utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
-	inet6 fe80::64c6:1885:bec0:c316%utun1 prefixlen 64 scopeid 0xc 
+	inet6 fe80::64c6:1885:bec0:c316%utun1 prefixlen 64 scopeid 0xc
 	nd6 options=201<PERFORMNUD,DAD>
 utun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
-	inet 10.16.132.213 -->  10.16.132.213 netmask 0xfffffe00 
+	inet 10.16.132.213 -->  10.16.132.213 netmask 0xfffffe00
 utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
 	inet6 2001:db8:cafe::132:213 --> 2001:db8:cafe::132:213 prefixlen 128
+utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
+	tunnel inet 192.0.2.1 --> 192.0.2.2
+	inet 192.0.2.100 --> 192.0.2.101 netmask 0xffffffff
+utun5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
+	tunnel inet 192.0.2.1 --> 192.0.2.2
+	inet6 2001:db8::1 --> 2001:db8::2 prefixlen 128
 ib0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 4092
         infiniband 80:00:02:08:FA:81:00:00:00:00:00:00:00:00:00:00:00:00:00:00  txqueuelen 256  (InfiniBand)
         RX packets 0  bytes 0 (0.0 B)
@@ -87,4 +93,3 @@ ib1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 4092
         RX errors 0  dropped 0  overruns 0  frame 0
         TX packets 0  bytes 0 (0.0 B)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
-