- not returning services in the same fashion as parse_services(protocol) did
- bad logic prevented parse_file( filename, { } ) from returning an array
of lines where filename was one of Nmap's data files (as it does for
other files)
- creating a table key with a value of nil when the pattern for the key
matches, but the pattern for the value doesn't - this was made most
obvious by the recent changes as it prevented them returning the correct
data
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