message: doc: update doc/benchmarking.md
diff: @@ -8,8 +8,10 @@ thread queue, wallet balance.
  Running
  ---------------------
  -For benchmarks purposes you only need to compile `bitcoin_bench`. Beware of configuring without `--enable-debug` as this would impact
  -benchmarking by unlatching log printers and lock analysis.
  +For benchmarking, you only need to compile `bitcoin_bench`. The bench runner
  +warns if you configure with `--enable-debug`, but consider if building without
  +it will impact the benchmark(s) you are interested in by unlatching log printers
  +and lock analysis.
  make -C src bitcoin_bench
  @@ -19,19 +21,28 @@ After compiling bitcoin-core, the benchmarks can be run with:
  The output will look similar to:
  ```
  -| ns/byte | byte/s | error % | benchmark
  -|--------------------:|--------------------:|--------:|:----------------------------------------------
  -| 64.13 | 15,592,356.01 | 0.1% | `Base58CheckEncode`
  -| 24.56 | 40,722,672.68 | 0.2% | `Base58Decode`
  +| ns/op | op/s | err% | total | benchmark
  +|--------------------:|--------------------:|--------:|----------:|:----------
  +| 57,927,463.00 | 17.26 | 3.6% | 0.66 | `AddrManAdd`
  +| 677,816.00 | 1,475.33 | 4.9% | 0.01 | `AddrManGetAddr`
  +
  +...
  +
  +| ns/byte | byte/s | err% | total | benchmark
  +|--------------------:|--------------------:|--------:|----------:|:----------
  +| 127.32 | 7,854,302.69 | 0.3% | 0.00 | `Base58CheckEncode`
  +| 31.95 | 31,303,226.99 | 0.2% | 0.00 | `Base58Decode`
  +
  ...
  ```
  Help
  ---------------------
  - src/bench/bench_bitcoin --help
  + src/bench/bench_bitcoin -?
  -To print options like scaling factor or per-benchmark filter.
  +To print the various options, like listing the benchmarks without running them
  +or using a regex filter to only run certain benchmarks.
  Notes
  ---------------------
  