Re: Re: Copy function for logical replication slots

Pushed this.

The mechanism of creating a new slot from the source, then later
advancing the LSN of the new slot using the updated values from the
source slot, seems quite clever.  I reworded the comment that explained
how it is supposed to work; please double-check to ensure I got it
right.

I renamed the opr_sanity-induced wrappers.  I see no reason to get
very precise about what's what ... these functions are all identical.

Thanks everyone!

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services