Feature Request: Log message should contain amount of violation

[stefanesser]

If an attacker/web application tries to send more than the configured limit of variables the log message just says that variables were dropped. Some people want to know the number of variables that were actually sent, so that they do not need to do trial and error how much they should raise the limit.

Have to check if we can do that without running into other problems.

[stefanesser]

Added to head branch