Errors on full node endpoints expose RPC password

[christroutner]

A lot of the endpoints will return the full error object as a last-ditch effort to return some intelligent error information on an unexpected error. Code like this:

rest.bitcoin.com/src/routes/v2/rawtransactions.ts

Lines 435 to 436 in c80b8df

	res.status(500)
	return res.json({ error: util.inspect(err) })

On full node endpoints like the one above, when the full node is down, the error message will expose the full node password and other RPC info.

This isn't a big threat for rest.bitcoin.com, because we run full nodes that have no wallets and hold no funds. But it's bad practice and should be fixed.