Add a new optional `CONN_MAX_IDLETIME`[^1] This allows to set the `SetConnMaxIdleTime` on `database/sql`. It's useful to allow to close more idle connections to reduce database connections, especially on postgresql. For me i would like to use it to set a higher max idle connections but they will all be closed after being idle. So also the last idle connection will be closed when there is no load on forgejo. I also use it with max connection lifetime, because currently `database/sql` doesn't detect a postgresql master change[^2] and i'll get `[E] can't update runner status: pq: cannot execute UPDATE in a read-only transaction`[^3] on forgejo until the connection is closed. [^1]: https://pkg.go.dev/database/sql#DB.SetConnMaxIdleTime [^2]: https://stackoverflow.com/questions/51858659/how-to-safely-discard-golang-database-sql-pooled-connections-for-example-when-t [^3]: https://matrix.to/#/!zpNKWqkiEOyljSMQDK:matrix.org/$_AJft_amsGn5hXGOYw75JoBJQnW3aKJEpb-Iw53L_TU?via=schinas.net&via=matrix.org&via=nitro.chat Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/2418 Reviewed-by: Gusted <gusted@noreply.codeberg.org> Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org> Co-authored-by: Michael Kriese <michael.kriese@visualon.de> Co-committed-by: Michael Kriese <michael.kriese@visualon.de>
