PgBouncer 1.8.1 maintenance release is out. The only fix is that it
includes a file in the distribution tarball that was missing in 1.8,
which prevented 1.8 from building. See
https://pgbouncer.github.io/2017/12/pgbouncer-1-8-1
for more information, the detailed changelog, and download links.
PgBouncer is a lightweight connection pooler for PostgreSQL.