IdentityInterface::findIdentity should return active users

```
interface IdentityInterface
{
    /**
     * Finds an identity by the given ID.
     * @param string|integer $id the ID to be looked for
     * @return IdentityInterface the identity object that matches the given ID.
     * Null should be returned if such an identity cannot be found
     * or the identity is not in an active state (disabled, deleted, etc.)
     */
    public static function findIdentity($id);
```

Removing unnecessary methods

Asterisk in Oracle not need quote

If quote asterisk oracle say "Syntax error"

It really should be: defining, attaching, using.

do not use scripting as it is disabled by default and will cause edge
case queries to fail

fixes #4187

change default facility of SyslogTarget

Added unit tests for Widget\ActiveField

LOG_SYSLOG - messages generated internally by syslogd. As we know PHP is not a part of syslogd therefore we should use LOG_USER. (additionaly LOG_USER is the only valid log type under Windows operating systems)

Not sure that I follow the last two paragraphs, but I may just be tired.

Already mentioned earlier in the text

Edited through “attaching”; added “event handler order” subsection