Install: Validate database before migrating (#12867)

* Validate database during install
Needed to remove usages of legacy functions in the validation

* Fix output, restore real versions

includes/common.php

@@ -144,18 +144,9 @@ function shorthost($hostname, $len = 12)
     return $shorthost;
 }
 
-function isCli()
-{
-    if (php_sapi_name() == 'cli' && empty($_SERVER['REMOTE_ADDR'])) {
-        return true;
-    } else {
-        return false;
-    }
-}
-
 function print_error($text)
 {
-    if (isCli()) {
+    if (App::runningInConsole()) {
         c_echo('%r' . $text . "%n\n");
     } else {
         echo '<div class="alert alert-danger"><i class="fa fa-fw fa-exclamation-circle" aria-hidden="true"></i> ' . $text . '</div>';
@@ -164,7 +155,7 @@ function print_error($text)
 
 function print_message($text)
 {
-    if (isCli()) {
+    if (App::runningInConsole()) {
         c_echo('%g' . $text . "%n\n");
     } else {
         echo '<div class="alert alert-success"><i class="fa fa-fw fa-check-circle" aria-hidden="true"></i> ' . $text . '</div>';
@@ -438,7 +429,7 @@ function c_echo($string, $enabled = true)
         return;
     }
 
-    if (isCli()) {
+    if (App::runningInConsole()) {
         global $console_color;
         if ($console_color) {
             echo $console_color->convert($string);