Accept low-fee transactions

[dagurval]

I suggest accepting low-fee transactions to the mempool for the block explorer.

Today I was hit by a bug in Copay that created a transaction that was 1 satoshi short of 1sat/byte. The only explorer that had said transaction was blockchair, and thanks to that I could figure out why my transaction was not confirming.

So, do the same and if possible also add a note that the transaction is low fee to help people than run into the same issue diagnose why their tx isn't confirming.

[sickpig]

closed by #51