Debugger: fixed HTTPS detection on nginx
removed obsolete function_exists()
tests: fixed arguments processing in run-tests.sh

The 'seq' is a command, not a shell internal, and can be missing (e.g. Cygwin).

And old behaviour was wrong. The 'shift' in '-c' and '-j' blocks should move the $i counter. Otherwise some argumens can change the position.

Note: There exists shorter $i-- expressions, but compatibility won.
run-tests.sh: call php with -n argument

Related to https://github.com/nette/tester/commit/477114ec17826174c20abd226a1a4373b4609fa0
run-tests.sh: print *.actual from Nette tests dir only

otherwise whole disc can be scanned.