Fixed CORE-4122: Metadata export with isql (option -ex) does not export functions properly.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58246 65644016-39b1-43b1-bf79-96bc8fe82c15
Examples reworked, added, commented better

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58247 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed the issue reported by Alex privately.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58249 65644016-39b1-43b1-bf79-96bc8fe82c15