The original part of the version is kept as is, and Percona specific
information is added after.
For example, psql displays the following after this commit:
SELECT version();
PostgreSQL 17.0.1 (Percona Server for PostgreSQL) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 6
4-bit
Where the addition is ".1 (Percona Server for PostgreSQL)", with the
".1" being the Percona version number.
Similarly, commands show the same information:
bin/pg_ctl --version
pg_ctl (PostgreSQL) 17.0.1 (Percona Server for PostgreSQL)