Fixed problem with LEAVE and CONTINUE syntaxes.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58070 65644016-39b1-43b1-bf79-96bc8fe82c15
Document CORE-1209 - CONTINUE statement.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58072 65644016-39b1-43b1-bf79-96bc8fe82c15
Added ALTER GENERATOR (as ALTER SEQUENCE) for consistency with the others SEQUENCE/GENERATOR commands.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58073 65644016-39b1-43b1-bf79-96bc8fe82c15
Document CORE-3018 - RECREATE, ALTER and CREATE OR ALTER SEQUENCE/GENERATOR statements.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58074 65644016-39b1-43b1-bf79-96bc8fe82c15