Refactor main() into more functions and convert #ifdef hell into plugins.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

finit.h

@@ -137,6 +137,10 @@
 extern int   debug;
 extern int   verbose;
 extern char *sdown;
+extern char *network;
+extern char *startx;
+extern char *hostname;
+extern char *username;
 
 /* initctl.c */
 void listen_initctl (void);