Implement mxid_age() to compute multi-xid age

Bruce Momjian <bruce@momjian.us>

Commit: 36ad1a87a368d837d5c2260b2fd2ff83e976425a
Author: Bruce Momjian <bruce@momjian.us>
Date: 2014-09-10T21:13:04Z
Releases: 9.5.0
Implement mxid_age() to compute multi-xid age

Report by Josh Berkus

Files