Use a referrer parser to extract referrer info

[abitmore]

Is your feature request related to a problem? Please describe.

https://bitsharestalk.org/index.php?topic=28821.msg333146#msg333146

The referer parser enrichment uses the Snowplow referer-parser to extract attribution data from referer URLs. You can provide a list of internal subdomains which will be treated as "internal" rather than unknown.

https://github.com/snowplow-referer-parser/nodejs-referer-parser

This is the node.js (JavaScript) implementation of referer-parser, the library for extracting search marketing data from referer (sic) URLs.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[sschiessl-bcp]

What is the purpose of this? When we parse all arguments, what do we do with it?

Currently, the value of ?r=x gets sent to the faucet.

[abitmore]

It turns out that the linked message in the forum has been updated to a spam. Since I didn't know what's it, I thought it's related to reference wallet. Now I guess it's just a random spam post.

[abitmore]

BTW there is a BSIP issue for discussing link formats: bitshares/bsips#246