add "-mausi_wol" bootargument

When "-mausi_wol" is set, WOL will be availiable.

IntelMausiEthernet/IntelMausiEthernet.cpp

@@ -132,6 +132,9 @@ bool IntelMausi::init(OSDictionary *properties)
 
     result = super::init(properties);
 
+    bool tmp = 0;
+    bool wol = PE_parse_boot_argn("-mausi_wol", &tmp, 0);
+
     if (result) {
         workLoop = NULL;
         commandGate = NULL;
@@ -171,8 +174,8 @@ bool IntelMausi::init(OSDictionary *properties)
         pciDeviceData.revision = 0;
         adapterData.pdev = &pciDeviceData;
         mtu = ETH_DATA_LEN;
-        wolCapable = true;
-        wolActive = true;
+        wolCapable = wol;
+        wolActive = wol;
         enableTSO4 = false;
         enableTSO6 = false;
         enableCSO6 = false;

README.md

@@ -1,3 +1,16 @@
+# IntelMausiEthernet-WOL
+Fork from IntelMausiEthernet with WOL functionality after complete shutdown.
+https://github.com/Mieze/IntelMausiEthernet
+
+To enable WOL just add the bootargument "-mausi_wol".
+
+This only works as a replacement for IntelMausiEthernet.kext.
+Please make a backup EFI folder on a thumbdrive bevore you try IntelMausiEthernet-WOL.kext.
+
+@xenio came up with this idea:
+https://github.com/Mieze/IntelMausiEthernet/issues/17#issuecomment-424290662
+Huge thanks to him!
+
 # IntelMausiEthernet
 OS X driver for Intel onboard LAN