Move pg_upgrade_support global variables to their own include file

Bruce Momjian <bruce@momjian.us>

Commit: 527fdd9df11eb338fdd372d16f62cd067de5204b
Author: Bruce Momjian <bruce@momjian.us>
Date: 2013-12-19T21:10:07Z
Releases: 9.4.0
Move pg_upgrade_support global variables to their own include file

Previously their declarations were spread around to avoid accidental
access.

Files