Support for PCAP file format

### Is your feature request related to a problem? Please describe.
I would like to analyze some can traffic with wireshark. With Wireshark it is possible to check e.g. CANopen communication as you see here: https://wiki.wireshark.org/CANopen.md

### Describe the solution you'd like
There is the pcap file formt supported by wireshark to load can traces https://wiki.wireshark.org/Development/LibpcapFileFormat
It would be nice to use python-can to record or convert into pcap file format for further processing