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.c

@@ -485,7 +485,7 @@ void wAbort(Bool dumpCore)
 		exit(1);
 }
 
-void print_help()
+static void print_help(void)
 {
 	printf(_("Usage: %s [options]\n"), ProgName);
 	puts(_("The Window Maker window manager for the X window system"));
@@ -511,7 +511,7 @@ void print_help()
 	puts(_(" --help			show this message"));
 }
 
-void check_defaults()
+static void check_defaults(void)
 {
 	char *path;
 
@@ -537,7 +537,7 @@ void check_defaults()
  * files have changed, using linux kernel inotify mechanism
  */
 
-static void inotifyWatchConfig()
+static void inotifyWatchConfig(void)
 {
 	char *watchPath = NULL;
 	inotifyFD = inotify_init();	/* Initialise an inotify instance */
@@ -563,7 +563,7 @@ static void inotifyWatchConfig()
 }
 #endif /* HAVE_INOTIFY */
 
-static void execInitScript()
+static void execInitScript(void)
 {
 	char *file, *paths;
 
@@ -581,7 +581,7 @@ static void execInitScript()
 	}
 }
 
-void ExecExitScript()
+void ExecExitScript(void)
 {
 	char *file, *paths;