Added a parsing step by comma for servers still sending back CSV for …

[johnrey1]

…multiple cookies #1

ran into same issue getting back a multi-cookie list where origin server separated by comma.

added a split on comma before the regex step

[rflechner]

Thank for your contrib, could you please add unit tests for this class to avoid any regression ?
They are missing in this project 😄

[johnrey1]

added a few unit tests. it's been a long time looking at the code. I tried to find the host server I used that returned me CSV cookies. I couldnt find it.
It's not standard to use CSV, just semi-colon separated. But I have run across old web servers that do.
I changed the code a bit, and created a separate regex to use in the case where a ';' does not exist in the cookie string.

let me know if this works!