Merge pull request #18 from dieterdemeyer/master

Modified ftp instance to support mysql backend
Merge pull request #19 from dieterdemeyer/master

Modified SQLDefaultUID+SQLDefaultGID + fix sftp key authentication
Merge pull request #20 from dieterdemeyer/master

Load module mod_sftp_sql
Merge pull request #21 from dieterdemeyer/master

Added SFTPClientMatch option array to sftp config
Merge branch 'master' of github.com:cegeka/puppet-proftpd