Adding omg.lol DNS API

[as-kholin]

DNS API for omg.lol.

Fixes #4466 .

Bug Report issue: #5299
API Wiki Entry: https://github.com/acmesh-official/acme.sh/wiki/dnsapi2#dns_omglol

[github-actions]

Welcome
First thing: don't send PR to the master branch, please send to the dev branch instead.
Please make sure you've read our DNS API Dev Guide and DNS-API-Test.
Then reply on this message, otherwise, your code will not be reviewed or merged.
We look forward to reviewing your Pull request shortly ✨
注意: 必须通过了 DNS-API-Test 才会被 review. 无论是修改, 还是新加的 dns api, 都必须确保通过这个测试.

[as-kholin]

Reviewed both API dev guide and API Test documentation, and believe I am following them consistently.

[as-kholin]

Sorry for the multiple moves back to draft - found a test issue, and was correcting it (and ensuring it was corrected).

[Neilpang]

update the variable names in:
https://github.com/acmesh-official/acme.sh/wiki/dnsapi2#dns_omglol
#5299

[as-kholin]

update the variable names in: https://github.com/acmesh-official/acme.sh/wiki/dnsapi2#dns_omglol #5299

Updated