Add new function for custom config usage for Postfix and Dovecot (#5988)

install/lib/installer_base.lib.php

@@ -1182,6 +1182,12 @@ class installer_base {
 		    $content = strtr($content, $postconf_placeholders);
 		    $postconf_commands = array_merge($postconf_commands, array_filter(explode("\n", $content)));
 		}
+		if(file_exists($conf['ispconfig_install_dir'].'/server/conf-custom/install/postfix_custom.conf.master')) {
+			$configfile = 'postfix_custom.conf';
+			$content = rfsel($conf['ispconfig_install_dir'].'/server/conf-custom/install/'.$configfile.'.master');
+			$content = strtr($content, $postconf_placeholders);
+			$postconf_commands = array_merge($postconf_commands, array_filter(explode("\n", $content)));
+		}
 
 		// Remove comment lines, these would give fatal errors when passed to postconf.
 		$postconf_commands = array_filter($postconf_commands, function($line) { return preg_match('/^[^#]/', $line); });

install/tpl/debian6_dovecot2.conf.master

+# Do not change this file, as changes will be overwritten by any ISPConfig update. Put your custom settings in /etc/dovecot/conf.d/99-custom-config.conf
 listen = *,[::]
 protocols = imap pop3
 auth_mechanisms = plain login
@@ -88,7 +89,7 @@ protocol lmtp {
 #2.3+         group = vmail
 #2.3+         mode = 0660
 #2.3+     }
-#2.3+ 
+#2.3+
 #2.3+     unix_listener stats-writer {
 #2.3+         user = vmail
 #2.3+         group = vmail
@@ -131,3 +132,4 @@ namespace inbox {
     special_use = \Trash
   }
 }
+!include_try conf.d/99-custom-config.conf

install/tpl/debian_dovecot2.conf.master

+# Do not change this file, as changes will be overwritten by any ISPConfig update. Put your custom settings in /etc/dovecot/conf.d/99-custom-config.conf
 listen = *,[::]
 protocols = imap pop3
 auth_mechanisms = plain login
@@ -86,7 +87,7 @@ protocol lmtp {
 #2.3+         group = vmail
 #2.3+         mode = 0660
 #2.3+     }
-#2.3+ 
+#2.3+
 #2.3+     unix_listener stats-writer {
 #2.3+         user = vmail
 #2.3+         group = vmail
@@ -108,3 +109,4 @@ plugin {
   quota_status_nouser = DUNNO
   quota_status_overquota = "552 5.2.2 Mailbox is full"
 }
+!include_try conf.d/99-custom-config.conf

install/tpl/fedora_dovecot2.conf.master

+# Do not change this file, as changes will be overwritten by any ISPConfig update. Put your custom settings in /etc/dovecot/conf.d/99-custom-config.conf
 listen = *,[::]
 protocols = imap pop3
 auth_mechanisms = plain login
@@ -82,7 +83,7 @@ protocol lmtp {
 #2.3+         group = vmail
 #2.3+         mode = 0660
 #2.3+     }
-#2.3+ 
+#2.3+
 #2.3+     unix_listener stats-writer {
 #2.3+         user = vmail
 #2.3+         group = vmail
@@ -125,3 +126,4 @@ namespace inbox {
     special_use = \Trash
   }
 }
+!include_try conf.d/99-custom-config.conf

install/tpl/postfix_custom.conf.master

+# You can use this file for custom Postfix settings. The used settings will overrule the settings set by ISPConfig.
+# Use with caution!
+# Put this file in /usr/local/ispconfig/server/conf-custom/install/ and make your changes there.