Guesses Oracle instance/SID names against the TNS-listener. If the 'oraclesids' script argument is not used to specify an alternate file, the default 'oracle-sids' file will be used. License to use the 'oracle-sids' file was granted by its author, Alexander Kornbrust (http://seclists.org/nmap-dev/2009/q4/645). SYNTAX: oraclesids: A file containing SIDs to try.