Corrected small typo
TODO: Test with non-Debian-OS

Right now the configs seem to be only tested with Debian GNU/Linux. However Fedora, SUSE etc. bring different versions of OpenSSL. So they might not work there.
Update README.md

Fix word repetition, typography and markdown formatting.
Merge pull request #25 from qbi/patch-2

TODO: Test with non-Debian-OS
Merge pull request #24 from qbi/patch-1

Corrected small typo
Merge pull request #28 from Bananeweizen/patch-1

Update README.md
Merge pull request #29 from ax3l/master

Disclaimer: Replace Heise Link (en)