Listing of /lib/include/pgsql/server/replication/ (upload file) (DB interaction files in red)
 (gzip & download folder) (chmod folder to 777) (these rarely work)
.
..
basebackup.h|Download||Edit||Delete| 
walreceiver.h|Download||Edit||Delete| 
walsender.h|Download||Edit||Delete| 
syncrep.h|Download||Edit||Delete| 
walprotocol.h|Download||Edit||Delete| 
walsender_private.h|Download||Edit||Delete|