/usr/share/postgresql/9.5/extension/pgmemcache.control is in postgresql-9.5-pgmemcache 2.3.0-2.
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 | # pgmemcache extension
comment = 'memcached interface'
default_version = '2.3.0'
module_pathname = '$libdir/pgmemcache'
relocatable = true
|