Add new features to logger plugin (command /logger, log level, level by buffer, mask by buffer, ..), fix some bugs

New features:
- new command /logger
- log level, to log only some messages, according to importance (task #8592)
- level by buffer: custom level for some buffers (or group of buffers)
- log filename mask by buffer (or group of buffers)
- marker line is added after display of backlog
- add "delete" callback for config file sections
- add "mkdir_parents" function to plugin API
- remove old log options in IRC plugin

Bug fix:
- marker line is set only when user switches buffer (not when a plugin force
  switch, like IRC plugin does when opening server or channel buffer)
- backlog fixed (sometimes lines were not properly displayed)

1 files changed, 2 insertions, 1 deletions

diff --git a/src/plugins/plugin-config.c b/src/plugins/plugin-config.c
index 57eb8b999..bc0aa97ea 100644
--- a/src/plugins/plugin-config.c
+++ b/src/plugins/plugin-config.c
@@ -186,7 +186,8 @@ plugin_config_init ()
             NULL, NULL,
             NULL, NULL,
             NULL, NULL,
-            &plugin_config_create_option, NULL);
+            &plugin_config_create_option, NULL,
+            NULL, NULL);
     }
     else
         plugin_config_section_var = NULL;