fix pear dependencies
- net_smtp2 to net_smtp
- auth_sasl2-beta to auth_sasl
Currently installing Net_SMTP2 results with the following error:
[09-Jan-2015 21:15:14 UTC] PHP Fatal error: Class 'Net_SMTP' not found in /var/www/program/lib/Roundcube/rcube_smtp.php on line 111
Switching back to Net_SMTP fixes this issue