add tool to generate correct cert chain based on http://www.uni-trier.de/index.php?id=22120
create postfix certs
use SSL for requesting certificates
add sorting, add hostname
refactor and move +gethostbyaddr() into its own shell function
Merge pull request #7 from mvo5/feature/hostname

add sorting, add hostname
Merge pull request #5 from mvo5/feature/import-dfn-pem-postfix

Feature/import dfn pem postfix
merge master and fix conflict