Added urldecode for ports in API to deal with slashes in port names

doc/INSTALL.md

@@ -90,12 +90,15 @@ Next, add the following to `/etc/apache2/sites-available/librenms.conf`:
       ServerName  librenms.example.com
       CustomLog /opt/librenms/logs/access_log combined
       ErrorLog /opt/librenms/logs/error_log
+      AllowEncodedSlashes On
       <Directory "/opt/librenms/html/">
         AllowOverride All
         Options FollowSymLinks MultiViews
       </Directory>
     </VirtualHost>
 
+If you are running Apache 2.2.18 or higher then change AllowEncodedSlashes to NoDecode
+
 If you have Apache 2.3 or newer then please add the following line before `AllowOverride All`:
 
     Require all granted

doc/INSTALL_RHEL.md

@@ -101,12 +101,15 @@ Next, add the following to `/etc/httpd/conf.d/librenms.conf`
       ServerName  librenms.example.com
       CustomLog /opt/librenms/logs/access_log combined
       ErrorLog /opt/librenms/logs/error_log
+      AllowEncodedSlashes On
       <Directory "/opt/librenms/html/">
         AllowOverride All
         Options FollowSymLinks MultiViews
       </Directory>
     </VirtualHost>
 
+If you are running Apache 2.2.18 or higher then change AllowEncodedSlashes to NoDecode
+
 Don't forget to restart Apache to make this active:
 
     service httpd restart

includes/api_functions.inc.php

@@ -215,7 +215,7 @@ function get_graph_by_port()
   $router = $app->router()->getCurrentRoute()->getParams();
   $device_id = $router['id'];
   $vars = array();
-  $vars['port'] = $router['port'];
+  $vars['port'] = urldecode($router['port']);
   $vars['type'] = $router['type'] ?: 'port_bits';
   if(!empty($router['from']))
   {