Implemented STEP for generators/sequences and took the opportunity to make the blrOp param const. Please rebuild the databases.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59401 65644016-39b1-43b1-bf79-96bc8fe82c15
Misc.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59402 65644016-39b1-43b1-bf79-96bc8fe82c15
Misc.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59403 65644016-39b1-43b1-bf79-96bc8fe82c15