/usr/share/postgresql/9.1/extension/pre_prepare.control is in postgresql-9.1-preprepare 0.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # preprepare extension
comment = 'Pre Prepare your Statement server side'
default_version = '0.4'
module_pathname = '$libdir/pre_prepare'
relocatable = true
|