improve multiple results support
The specification talks exactly about -1:
> Returns: the current result as an update count;
> -1 if the current result is a ResultSet object or there are no more results
Other negative numbers can theoretically mean something different than „no more results“
e.g. unknown number of updates (?).
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java/sql-dk/src/main/resources/info/globalcode/sql/dk/version.txt
java/sql-dk/src/main/resources/info/globalcode/sql/dk/help.txt
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^distributions/debian/.*\.deb$
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