fix onSubmit in mail_user_edit



See merge request !583

handle the server/plugins-enabled folder based on enabled/disbaled services



See merge request !582

change password-defaults to pass https://mariadb.com/kb/en/mariadb/simple_password_check/



See merge request !581

fix nginx redirects section

It seems that the "redirects" section of the nginx vhost master template contains obsolete code that was not updated (in comparison with other parts of this template). This commit is intended to fix the following errors:

*  the redirects section doesn't respect the nginx port settings of ISPConfig (it uses hard-coded values 80 and 443 only)
* the redirects section doesn't respect the HTTP2/SPDY settings
* the redirects section doesn't define the standard SSL protocols that ISPConfig uses everywhere else
* the redirects section contains invalid path for SSL certificate files (closes #4472, closes #3302)

See merge request !580

improved nginx http to https redirect

"if" constructions in nginx should be used only if no other solution is possible, because "if" is the slowest directive and adds performance penalties (["If is Evil"](https://www.nginx.com/resources/wiki/start/topics/depth/ifisevil/)). This merge request is supposed to improve this issue and adds another "server" block instead of using "if" directive. This is a "standard" approach which is widely used in nginx configurations for http->https redirections. All other functionality and features of ISPConfig are preserved.

Closes #2209 (redirection without "if" directive)
Closes #3118 (the "split" is achieved using "server" blocks without "if" directive)

See merge request !578

Make AWstats default

Webalizer is pretty old and the latest release dates back to 2013.  
The generated statistics are even not really accurate, as mentioned here:  https://en.wikipedia.org/wiki/Webalizer#Criticism  

In conclusion I would appreciate it if the default value could be changed to AWstats.  
This merge request does address #3549

See merge request !577

Varios French translation improvements



See merge request !579

Make the webserver's rentention time for log files configurable

This feature ditches the current static 30 days approach of logfile purging and introduces a configurable retention time for each website.  
The retention time configuration can be found in the options tab of the website settings.  
  
  
  
Default retention time is the current 30 days value.  

However, by this approach it's possible to have retention times like 0 (forever), or very short retention times like 7 days which are often demanded by public/government data security officials which we have in germany.

See merge request !576

added support for sql flags

this adds support for MySQL SSL encryption between servers in multiserver setup

See merge request !573

instead we are now using dynamic purging of the logs.

RewriteRule ^ %{REQUEST_URI} is faster than ^(.*)$ $1



See merge request !562

Fix #4601 Rewrite HTTP to HTTPS subdomain problem

This resolve:
On fast-cgi and php-fpm (maybe the others configurations too) subdomain redirection from http to https.

I opened a bug on: ispconfig/ispconfig3#4601

See merge request !565

cancel to right location dns records

when one is going to add a dns record and pushes the cancel button, it returns to the **DNS Zone** tab instead of **Records**

See merge request !572

vlogger for more precise stats with %O for apache >=2.5

this provides a more accurate traffic statistic, since also includes the amount of bytes received according to [apache doc](https://httpd.apache.org/docs/trunk/mod/mod_logio.html)

i could not make work version >= 2.4.7, so i opted to use this for version >= 2.5

See merge request !571

stretch added



See merge request !568