sonnb - Stop Spam Here 2.0.0 RC 16

Fix an issue with the contact form.

- Fix moderation bugs for Link, Language and Akismet check.
- The content id is now correctly logged rather than 0 in some cases.
- Optimize the code for a better running.

- Fix an issue which prevent users from creating a thread if moderation action was applied.

- Fix an issue in keyword checking which did not correctly take into account the custom actions defined in each keyword.
- Fix an issue with thread creation when there are keywords matched the defined keywords.
- Fix an issue in IP registration threshold checking which did not work as expected due to invalid IP data passed to the query.
- Fix an issue with the checking orders of keywords, links, language and Akismet in which the later check could be ignored by the above one.

- Fix an issue which throws errors in the Server Log if the point system has been activated.
- Fix an issue which throws an error when creating a Thread.
- Fix an issue due to an deprecated API in the latest GuzzleHttp version in XF2.

Fix a minor issue where an error could be raised if the bot API addon is not installed.

I accidentally overwrote the addon.json file in the RC3 build, threfore you might get the 'Please enter invalid title' on installation. This RC4 release will fix this issue.

Fix an issue with the registration checking.

- Fix an another issue when installing the addon.

- Add the bot API integration with the following add-on: http://www.sonnb.com/resources/sonnb-stop-spam-here-bot-detector-api-xf-2-0.16/

Fix invalid callback class on installation or upgrade.