Load manufdb in data.py and add Windows support

scapy/config.py

@@ -343,7 +343,7 @@ extensions_paths: path or list of paths where extensions are to be looked for
     services_tcp = TCP_SERVICES
     services_udp = UDP_SERVICES
     extensions_paths = "."
-    manufdb = load_manuf("/usr/share/wireshark/manuf")
+    manufdb = MANUFDB
     stats_classic_protocols = []
     stats_dot11_protocols = []
     temp_files = []

scapy/data.py

@@ -173,10 +173,12 @@ if WINDOWS:
     ETHER_TYPES=load_ethertypes("ethertypes")
     IP_PROTOS=load_protocols(os.environ["SystemRoot"]+"\system32\drivers\etc\protocol")
     TCP_SERVICES,UDP_SERVICES=load_services(os.environ["SystemRoot"] + "\system32\drivers\etc\services")
+    MANUFDB = load_manuf(os.environ["ProgramFiles"] + "\\wireshark\\manuf")
 else:
     IP_PROTOS=load_protocols("/etc/protocols")
     ETHER_TYPES=load_ethertypes("/etc/ethertypes")
     TCP_SERVICES,UDP_SERVICES=load_services("/etc/services")
+    MANUFDB = load_manuf("/usr/share/wireshark/wireshark/manuf")