Description of problem:

After upgrading the exim and exim‑pgsql packages from EPEL on Rocky Linux 9.6 all PostgreSQL lookups fail with:

```
failed to expand "pgsql;SELECT name FROM domains WHERE name = '${quote_pgsql:$domain}'" while checking a list: unknown lookup type "pgsql"
```

Version-Release number of selected component (if applicable):

exim-4.99-1.el9.aarch64
exim-pgsql-4.99-1.el9.aarch64

How reproducible:

1. Create a PostgreSQL database that contains a table `domains` with at least a `name` column.

2. Configure Exim as follows:

   ```
   pgsql_servers = ...

   domainlist virtual_domains = pgsql;SELECT name FROM domains WHERE name = '${quote_pgsql:$domain}'
   domainlist local_domains   = +primary_domains : +virtual_domains
   ```

3. Restart Exim.

4. Send a message addressed to a domain that exists in the `domains` table.

Actual results:

Delivery fails and the Exim log contains the "unknown lookup type pgsql" error.

Expected results:

Exim should load the `pgsql` lookup module, execute the SQL query, obtain the domain name from the database, and process the message normally.

Additional info:

Rebuilding the exim package with static linking against `libpq` removes the error, which suggests that the dynamic linkage to the shared library provided by exim-pgsql is not working properly.