Expose Options::periodic_compaction_seconds via C API

[zaidoon1]

Created this pr in rocksdb repo: facebook/rocksdb#12019 but it's unclear if/when the pr will be accepted. I'm working on switching to speedb so decided to make the change directly here.

[udi-speedb]

@zaidoon1 - I have just updated our CONTRIBUTING.md guide.
When changing existing rocksdb files, we are adding our license text at the top, before the existing Facebook / LevelDB license text(s).
Please add the license text to db/c_test.c file.
Thanks

[maxb-io]

ci

[zaidoon1]

@zaidoon1 - I have just updated our CONTRIBUTING.md guide. When changing existing rocksdb files, we are adding our license text at the top, before the existing Facebook / LevelDB license text(s). Please add the license text to db/c_test.c file. Thanks

done

[udi-speedb]

@zaidoon1 - I have just updated our CONTRIBUTING.md guide. When changing existing rocksdb files, we are adding our license text at the top, before the existing Facebook / LevelDB license text(s). Please add the license text to db/c_test.c file. Thanks

done

Thanks. However, next time please don't force push. Just add a new commit.
At the time of the merge, we are squashing all of the commits and make sure the commit message is correct.

[udi-speedb]

Hi,
I am sorry but I have missed the required update to our HISTORY.md file.
Please add a short description of your change under the "Enhancements" section of the Unreleased changes at the top.
Thanks

[zaidoon1]

Hi, I am sorry but I have missed the required update to our HISTORY.md file. Please add a short description of your change under the "Enhancements" section of the Unreleased changes at the top. Thanks

done