nightly update

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@57813 65644016-39b1-43b1-bf79-96bc8fe82c15
Rolled back my change - it breaks setting FIREBIRD in environment without "/" in the end

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@57814 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-3269: When server gets unavailbale, client does not perform detach correctly

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@57815 65644016-39b1-43b1-bf79-96bc8fe82c15