Parsing actions ULOG and NFLOG

[diekmann]

When talking about filtering behavior, the actions ULOG, NFLOG, and LOG all behave equally: They only log (somehow) and do not influence the filtering behavior. The parser (tokenizer) should recognize them all as just LOG.

At the moment, the tool refuses analysis because it does not know the actions NFLOG and ULOG.

This needs to implemented both in the SML parser and the haskell tool. The parser tester needs test cases for this.