pub fn install_sighup_handler()Expand description
Install a SIGHUP signal handler that sets RELOAD_REQUESTED.
Call this once at server startup (before the accept loop). Safe to call on non-Unix platforms — it compiles to a no-op.
The handler itself does the minimum allowed in a signal context: it stores
true into an AtomicBool. The actual reload() call happens on the
main thread between connection accepts.