Display the uname sysname and release as the OS option in the pcap Section
Header Block, falling back on just the std::env::consts::OS name ("linux") in
the case of runtime errors.
Co-authored-by: Nat Budin <natbudin@gmail.com>
Mixing async and sync I/O leads to a multitude of complications, and
generally speaking it's much more convenient to stick to one paradigm
or the other. Since axum (and many other HTTP servers) use async,
and since async is a convenient model for performing operations like
"handle an MPSC message or file read, whichever happens first", let's
commit to an async interface.
