RFC: Increase Nokogiri::Gumbo::DEFAULT_MAX_ERRORS to a positive number

[flavorjones]

I'm not totally sure why this was initially set to 0 but I think it would be useful to:

• set it to a finite positive number, so some errors are recorded from the parser
• if the parser hits the max, then the last error should be something like There are more errors which were not recorded. Please set :max_errors to a larger number.

I would consider eventually setting the default to -1 to capture all errors, but we should probably think about whether this is something that could be abused by an attacker via untrusted content.

[stevecheckoway]

It's a holdover from Nokogumbo. See rubys/nokogumbo#78 for some discussion and rubys/nokogumbo#65 for the initial rationale.

[flavorjones]

Fascinating threads, thank you. I guess I'll think about this a bit more.