Fixed CORE-4326: Keyword SET should not be required in ALTER USER statement

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59088 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4327: Error in QLI when copying NULL blobs between databases

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59089 65644016-39b1-43b1-bf79-96bc8fe82c15