Reduce heap allocs 2 (#46)

* reduce heap allocations in tcp logging; omit use of AppendFloat which allocates a metric sh*tton

* debugheaplog: better heap statistic logging

* heap: use string for pcap.Frame.Protocol

* add potential to eliminate Flags.String heap alloc, remove incorrect HEAP comments

* add StackAsync.DebugErr and httpraw.SetBytes

* many heap alloc reductions and replacement of bytes.Equal with internal.BytesEqual

internet/stack-ip.go

@@ -232,3 +232,11 @@ func (l logger) debug(msg string, attrs ...slog.Attr) {
 func (l logger) trace(msg string, attrs ...slog.Attr) {
 	internal.LogAttrs(l.log, internal.LevelTrace, msg, attrs...)
 }
+
+const enableAllocLog = false
+
+func debugLog(msg string) {
+	if enableAllocLog {
+		internal.LogAllocs(msg)
+	}
+}