Had error message: Sever with specified hostname could not be found.
Solved the problem with instruction from author of thread and some little steps.
First, after deleting the following sources
and using normal repo:
nothing happened and I get same error again.
After following steps I got working repo:
- Close Cydia again (remove from multitasking),
- WAIT few minutes,
- start Cydia again,
- WAIT until Cydia is done with actualization.
- As it is add normal Repo again
I don't know if it was only fortuna and these steps have nothing to do with getting working repo

Decided to write steps here, perhaps it helps someone else too.
Thanks for instruction and the best source!!