/usr/share/postgresql/10/extension/intagg.control is in postgresql-10 10.6-0ubuntu0.18.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # intagg extension
comment = 'integer aggregator and enumerator (obsolete)'
default_version = '1.1'
relocatable = true
|