allow -o output to stdout
+23.02.2021
+==========
+hcxdumptool: allow output to stdout
+-o <dump file> : output file in pcapng format, filename '-' outputs to stdout
+ including radiotap header (LINKTYPE_IEEE802_11_RADIOTAP)
+
+
14.02.2021
==========
sll_pkttype = PACKET_OUTGOING is completey ingnored in promiscuous mode
