Fixed CORE-4202: Backup/Restore from old version to v3.0 fails with BLR error.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58565 65644016-39b1-43b1-bf79-96bc8fe82c15
Improved the error reporting.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58566 65644016-39b1-43b1-bf79-96bc8fe82c15
Totally misc.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58567 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4205 - ISQL -x does not output the START WITH clause of generators/sequences.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58568 65644016-39b1-43b1-bf79-96bc8fe82c15
Improvement CORE-4199 - Add optional START WITH clause to identity columns.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58569 65644016-39b1-43b1-bf79-96bc8fe82c15
Cleanup and use the explicit rollback via TIP for all kinds of forced disconnections.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58571 65644016-39b1-43b1-bf79-96bc8fe82c15
Avoid rescheduling if we're kindly asked to stop immediately.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58572 65644016-39b1-43b1-bf79-96bc8fe82c15