Parsing issues with fapolicyd config

[jw3]

Need parsing implementations for watch_fs and syslog_format

ht: @tparchambault

[tparchambault]

Noticed during V1.3 testing and verified with @jw3 and in rust libs, that only simple checking of fields has been implemented up to this point. An image says it best:

There are only specific syslog field values and filesystem type values that are valid. See man fapolicyd.conf for those specifics associated with the fapolicyd version as a starting point.