Add ARIN automatic TAL download if user accepts RPA

[lspgn]

• Add CLI argument -accept-arin-rpa

[AlexanderBand]

I didn't look at your code but just to be clear, you don't have to go through the trouble of downloading the TAL on launch. You can include it in the binary as long as the software contains a "a non-ambiguous affirmative action" such as typing -accept-arin-rpa.

[job]

it is insane that more and more implementations pull in the toxic agreement with --accept-arin-rpa command line options. did you read it? is that really what you want users to consent to to get access to RPKI data that should be free?

Why grant ARIN this power over your software?