- Move the seeking inside of DetectFeedFormat instead of having it everywhere
in ParseFeed
- Provide a hint for the compiler to eliminate a useless bound check in
DetectJSONFormat, otherwise it'll check that buffer[i] is valid on every
iteration of the loop. This shouldn't make a big difference, but oh well.
There is no need to detect the format and then the version when both can be
done at the same time.
Add a benchmark as well, on large and small atom and rss files.
