fixed interface usage

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58589 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4185: related issues with crypt thread start/stop

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58590 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4211: Embedded engine hangs for 5 seconds when closing

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58591 65644016-39b1-43b1-bf79-96bc8fe82c15