feature: Added web validation (#7474)

* refactor: convert validations to modules to prep for gui integration

* accidentally dropped, schema update

* fix accidental output to webui

* mention discovery-wrapper.py and re-arrange.

* refine some fix statements

* rename the Config validation group to Configuration.

* fix some scrutinizer issues
remove as many local functions from validator.php as possible
move extensions from pre-check
remove duplicate timezone check
looks like there is some db schema differences between mariadb 10.1 and 10.2, investigating

* mariadb version diff take2

* Check schema version first for database.
Remove stop to go back to command line for install docs.
Add helpful link when there is no devices added to /addhost

* fix incorrect validation for empty string defaults

* Fix style

* Add additional file permissions checks

* catch exception and fail for invalid timezone
Change visuals a bit.

* add php version warning

* fix space

html/includes/functions.inc.php

@@ -72,7 +72,7 @@ function nicecase($item)
 
         case 'nfs-v3-stats':
             return 'NFS v3 Stats';
-            
+
         case 'nfs-server':
             return 'NFS Server';
 
@@ -111,7 +111,7 @@ function nicecase($item)
 
         case 'fbsd-nfs-server':
             return 'FreeBSD NFS Server';
-        
+
         case 'php-fpm':
             return 'PHP-FPM';
 
@@ -163,6 +163,20 @@ function toner2colour($descr, $percent)
 }//end toner2colour()
 
 
+/**
+ * Find all links in some text and turn them into html links.
+ *
+ * @param string $text
+ * @return string
+ */
+function linkify($text)
+{
+    $regex = "/(http|https|ftp|ftps):\/\/[a-z0-9\-.]+\.[a-z]{2,5}(\/\S*)?/i";
+
+    return preg_replace($regex, '<a href="$0">$0</a>', $text);
+}
+
+
 function generate_link($text, $vars, $new_vars = array())
 {
     return '<a href="'.generate_url($vars, $new_vars).'">'.$text.'</a>';