check_pseudo_time() used zeek_start_time which skews things sufficiently
around being in the past when ZAM compilation takes multiple seconds. Switch
to using first_wallclock instead.
Further, move setting of first_timestamp and first_wallclock from PktSrc
into RunState's dispatch_packet(), so it's more centralized now.
The only pseudo_realtime piece left in PktSrc() is in GetNextTimeout() to
determine how long the PktSrc is idle until the next packet is ready.
This largely copies over Spicy's `.clang-format` configuration file. The
one place where we deviate is header include order since Zeek depends on
headers being included in a certain order.
- Move all of the time handling code out of PktSrc into RunState
- Call packet_mgr->ProcessPacket() from various places to setup layer 2 data in packets
