Log Message:
pgbouncer: update to 1.22.1.

Based on PR 58137 by Patrick TJ McPhee; some cleanups while here.

Changes:

2019-08-27 - PgBouncer 1.11.0 - "Instinct for Greatness"
- Add support for SCRAM authentication and other password handling improvements
- Option to disable stats logging and other logging improvements
- Bug fixes and test suite improvements

2019-10-17 - PgBouncer 1.12.0 - "It's about learning and getting better"
- Support SO_REUSEPORT socket option
- Add support for using a pgbouncer-specific resolv.conf
- Fixes related to statistics reporting and password management
- Removes support for libevent 1.x and adds requiremetn to use pkg-config

2020-04-27 - PgBouncer 1.13.0 - "My favourite game"
- option to set tcp timeout
- TLS protocols now default to "secure" (TLS 1.1 and earlier turned \ 
off by default)
- various bug fixes

2020-06-11 - PgBouncer 1.14.0 - "La ritrovata magia"
- Add SCRAM authentication pass-through.
- New, minimal, sample config file

2020-11-19 - PgBouncer 1.15.0 - “Ich hab noch einen Koffer in Berlin”
- Improve authentication failure reporting.
- Don't log anything if client disconnects immediately.
- SHOW CONFIG now also shows the default values of the settings.
- A few bug fixes

2021-08-09 - PgBouncer 1.16.0 - Fended off a jaguar"
- Support hot reloading of TLS settings
- Add support for abstract Unix-domain sockets
- Increased the maximum lengths of passwords and usernames (996, 128)
- Tighter error handling in config parsing
- Query cancel handling has been fixed
- Mixed use of md5 and scram via hba has been fixed
- "FIXME: query end, but query_start == 0" has been fixed
- Fix reloading of default_pool_size, min_pool_size, and res_pool_size.
- reserved "pgbouncer" as a database name
- various cleanups and test improvements

2021-11-11 - PgBouncer 1.16.1 - "Test of depth against quiet efficiency"
- Fix to a potential man-in-the-middle vulnerability (CVE-2021-3935)

2022-03-23 - PgBouncer 1.17.0 - "A line has been drawn"
- support for round-robin database connection
- some errors not reported to unauthenticated clients
- increased maximum password length again
- openssl 3 support fixed
- dropped support for python 2 in test suite
- various other bug fixes

2022-12-12 - PgBouncer 1.18.0 - "No real mystery"
- Add application_name to SHOW CLIENTS/SERVERS/SOCKETS output
- Add information about cancel requests to SHOW CLIENTS/SERVERS/POOLS output
- Bug fixes, including an overflow bug and a race condition in query \ 
cancellation handling

2023-05-04 - PgBouncer 1.19.0 - "The old-fashioned, human-generated kind"
- Add support for peering between PgBouncer processes.
- Add the SHOW STATE command
- A few new configuration options
- New testing framework
- Various bug fixes

2023-05-31 - PgBouncer 1.19.1 - Sunny Spring
- Fix a few fatal errors
- Add missing files from the new testing framework

2023-07-20 - PgBouncer 1.20.0 - "A funny name goes here"
- Online restart option is now considered deprecated
- Introduce the track_extra_parameters which allows tracking of more parameters \ 
in transaction pooling mode.
- Forward SQLSTATE in authentication phase.
- Change default server_tls_sslmode to prefer
- Add support for the options startup parameter.
- Various bug fixes

2023-08-09 - PgBouncer 1.20.1 - "Optional options"
- Fixed regression related to options startup parameter

2023-10-16 - PgBouncer 1.21.0 - "The one with prepared statements"
- Add support for protocol-level named prepared statements
- Improve security of OpenSSL settings
- Various bug fixes

2024-01-31 - PgBouncer 1.22.0 - "DEALLOCATE ALL"
- Adds support for DEALLOCATE ALL and DISCARD ALL
- Support configuring auth_query per database
- Make fail fast logic handle all scenarios where no working connections to the \ 
database exist anymore and none can be established
- Some bug fixes

2024-03-04 - PgBouncer 1.22.1 - "It's summer in Bangalore"
- Fix issues caused by some clients using COPY FROM STDIN queries.
- Add missing tests to release tarball
- Multiple documentation improvements