9.4.15-0+deb8u1) is not available, but a newer one is (9.4.18-0+deb8u1). We redirected you there.
/usr/share/postgresql/9.4/postgres.shdescription is in postgresql-9.4 9.4.18-0+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | 1 pg_database default template for new databases
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