Fixed redirection after advertisement site

[JackBailey]

It would redirect to the advertisement site fine but after it would redirect to the system home, this worked for me and should work perfectly for everyone else.
You may need to change line 54 (starting return '//' . $_SERVER['SERVER_NAME'] ) as the comment says if yourls is not installed in your base domain

[JackBailey]

There may be a few inefficiencies with the code as I haven't written in php or have much experience with making a yourls plugin but it works and I've commented what the lines I added do so you're welcome to fix them

[8MiYile]

Hi brother, my repository references your updates and supports git updates
Thanks
https://github.com/8Mi-Tech/yourls-conditional-urlads

[JackBailey]

Hi brother, my repository references your updates and supports git updates
Thanks
https://github.com/8Mi-Tech/yourls-conditional-urlads

Looks great, thanks. Might be worth submitting a PR to the plugin list for yourls if you haven't already

[8MiYile]

Hi brother, my repository references your updates and supports git updates
Thanks
https://github.com/8Mi-Tech/yourls-conditional-urlads

Looks great, thanks. Might be worth submitting a PR to the plugin list for yourls if you haven't already

YOURLS/awesome#132

[8MiYile]

@JackBailey you can check out my update log
8Mi-Tech#1

[HeroCC]

sorry I didn't see this until now, merging -- thanks for the contribution!

[HeroCC]

Fixes #3