UTF-8-encode input from log files in stats reporting

[AudreyAltman]

This fixes issue #7763

get-api-stats.rb was throwing an ArgumentError at line 80 if the line being read in from the log file had a non-UTF-8 character. This change encodes each log file line as UTF-8 before the regex evaluation. It also ensures that the regex will use UTF-8 (line 67).

[no-reply]

Is it feasible to add a test?

[AudreyAltman]

I don't believe that there are currently any tests for this file. So yes I could add a test, but I'm not sure if it would be valuable without writing more comprehensive tests for this file.

[no-reply]

I think a regression test for this particular fix would be useful.

[markbreedlove]

This change looks good to me, though I haven't considered the testing particulars.

[AudreyAltman]

After further inspection, I realize that the only logfile that required this fix was actually not a logfile at all. Rather, it was a special record that markbreedlove made to account for the rs to aws changeover. Since we are not likely to ever again encounter a file such as this, and by extension an error such as this, I wonder if it is worth changing the codebase at all.

[anarchivist]

I'll close the PR and add your comment to the ticket.