pub const BROADCAST_MTU: usize = 500; // 500usizeExpand description
RNS 1.4.2 Reticulum.MTU: the maximum byte size of one packet on the broadcast plane (announces, path requests, un-linked Singles), which peers must agree on. A wire-protocol invariant, permanently 500 even on fat pipes; the per-link MTU a LINKREQUEST negotiates is separate.