Added: Form fields are disabled if a client is not allowed to edit a domains main settings

- Implemented: FS#1935 - Add minimum allowed seconds Value for DNS zone records

Fixed (partly) FS#2310 - Template switch not working in mailuser module, for dashlets and the login page

Just mailuser fixed

automatically enable remote access and add the webserver's ip to the remote_ips list

- Added missing sys_tpl table to ispconfig3.sql and moved the definition of the table to the upd_0035.sql file as new tables cant be added in existing update files.
- added new ssl_key field to web_domain table.
- cleaned up unused code from apache plugin.

- install: touch auth.log
- login: write success/fail to auth.log
- cron: log rotation for auth.log

fail2ban compatible login log (no permissions for /var/log/ispconfig/login.log) - to be fixed! (FS#2244)

- Fixed: FS#2292 - monitor_tools.inc.php uses /var/vmail and not the mail directory specified in server config
- Changed code comment in login/index.php file.