New "irc/debug" buffer (replaces old IRC raw buffer), improved status bar display, fixed nick in input for IRC buffers

The "irc/debug" buffer is displayed when IRC debug is enabled (with "/debug irc" thru debug plugin).
If the buffer is closed, it is reopen when new messages are written, until debug is disabled by user (with "/debug irc").

src/plugins/irc/irc-debug.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2003-2008 by FlashCode <flashcode@flashtux.org>
+ * See README for License detail, AUTHORS for developers list.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef __WEECHAT_IRC_DEBUG_H
+#define __WEECHAT_IRC_DEBUG_H 1
+
+#define IRC_DEBUG_PREFIX_RECV     "-->"
+#define IRC_DEBUG_PREFIX_RECV_MOD "==>"
+#define IRC_DEBUG_PREFIX_SEND     "<--"
+#define IRC_DEBUG_PREFIX_SEND_MOD "<=="
+
+struct t_irc_server;
+
+extern void irc_debug_printf (struct t_irc_server *server, int send,
+                              int modified, char *message);
+extern void irc_debug_init ();
+
+#endif /* irc-debug.h */