adodb-lib: Fix columns quoting bug

See https://sourceforge.net/p/adodb/bugs/127/
Remove obsolete comment
Remove closing php tag

http://php.net/manual/en/language.basic-syntax.phptags.php
PHPdoc for ADOConnection->Param()
Fix ADODB_postgres64->Param()

The method now properly resets the parameter count to 1 when $name is
false (or 0).
Merge branch 'master' into mantis-1.3