[SFTP] fix issue when public_ip and rcon_ip are different in b3.xml or when a domain name is used in place of an IP
[SFTP] get rid of "no handler found for paramiko.transport" errors
[CORE] onLoadConfig hook is now called by the parser instead of at plugin instantiation (again)
[CORE] fix httpytail, ftpytail and sftpytail plugins that would be loaded twice if found in the plugins section of the b3.xml file