Dump config to a file

[adamschmideg]

If a file is specified, dump it to the file. Otherwise, dump it to stdout. See #16383

[lhendre]

Hi, I would be interested in this. To clarify, Do you mean to generate a configuration file of geth to a file/stdout based on the description in the other issue?

[karalabe]

Our current workflow was that we print to stdout, and the user can pipe it into a file. Windows PowerShell apparently screwes up the encoding when piping, so the idea is for dumpconfig to accept an optional argument - a file name - into which we can dump explicitly ourselves instead of stdout.

So we could do geth dumpconfig as previously, but also geth dumpconfig somefile.conf.

[karalabe]

Done!