php: improvements in handling PHP server configuration

- frontend: added the option to enable or disable the debug mode
- frontend: optimized the number of calls to the 'get_configuration()' function of the manager when rendering the php page: 1 single call instead of 6 (8 when autoscaling is enabled)
- frontend and manager: updated the default values for the configuration parameters to match the ones in PHP v 5.6
- frontend: more sensible available values for parameters (I don't think a 4 GB post size is achievable)
- frontend: fixed indentation in PhpPage.php
- manager: the initial PHP configuration contains the default values (if not, when PHP is updated, a discrepancy may appear between the default values in the ConPaaS and the ones in PHP, leading to an unwanted effect in which changing a value from the web frontend will also change other values)
- cps-tools: shortened the 'get_configuration' command to 'get_config'
- cps-tools: human readable output for the 'get_configuration' command
- uploading code using git: more informative message from the git push hook (prints the code version id of the code just pushed)

conpaas-frontend/www/js/hosting.js

@@ -69,7 +69,7 @@ conpaas.ui = (function (this_module) {
             $('.deployactions').toggleClass('invisible');
         });
         // configuration handlers
-        $('#conf-maxexec, #conf-memlim, #conf-uploadmaxsize, #conf-postmaxsize').change(function() {
+        $('#conf-maxexec, #conf-memlim, #conf-uploadmaxsize, #conf-postmaxsize, #conf-debugmode').change(function() {
             $('#saveconf').removeAttr('disabled');
         });
         $('#conf-disablefunctions').focus(function() {
@@ -230,6 +230,7 @@ conpaas.ui = (function (this_module) {
                 upload_max_filesize: $('#conf-uploadmaxsize').val(),
                 post_max_size: $('#conf-postmaxsize').val(),
                 disable_functions: $('#conf-disablefunctions').val(),
+                display_errors: $('#conf-debugmode').val(),
             }};
         $(event.target).attr('disabled', 'disabled');
         page.updateConfiguration(params, function () {

conpaas-frontend/www/lib/service/php/__init__.php

@@ -21,7 +21,6 @@ public function __construct($data, $manager) {
 		}
 	}
 
-
 	public function getConfiguration() {
 		if (!$this->isReachable()) {
 			return null;