Moving header functions to main.h

The functions of main.c should be included in main.h, not in funcs.h.
This patch adds the main.h file and moves the function prototypes to
this file.

The not needed "include funcs.h" are removed.

src/main.h

@@ -0,0 +1,33 @@
+/*
+ *  Window Maker window manager
+ *
+ *  Copyright (c) 1997-2003 Alfredo K. Kojima
+ *  Copyright (c) 1998-2003 Dan Pascu
+ *
+ *  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 2 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, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef WMMAIN_H_
+#define WMMAIN_H_
+
+void Exit(int status) __attribute__((noreturn));
+void Restart(char *manager, Bool abortOnFailure);
+void SetupEnvironment(WScreen *scr);
+void ExecuteShellCommand(WScreen *scr, char *command);
+Bool RelaunchWindow(WWindow *wwin);
+void wAbort(Bool dumpCore);
+void ExecExitScript(void);
+
+#endif