Make bitcoind invalid argument error message specific

Summary:
The current message is not helpful. Hardly anyone even remembers that
bitcoind used to be a cli utility, let alone new users. Print what the
actual problem is.

This is a backport of Core's PR10447

Test Plan:

make check

Reviewers: #bitcoin_abc, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Subscribers: teamcity

Differential Revision: https://reviews.bitcoinabc.org/D1828