Prototype support for /etc/netork/interfaces

This patch adds prototype support for the Debian/Ubuntu/Busybox network
configuration file /etc/netork/interfaces.  If this file exists Finit
will call `ifup` for each (non-commented-out) interface marked `auto`.

With this implementation we block boot until all ifup commands have
returned, which is less than ideal.  A better approach would be to ifup
only loopback and create deferred tasklets to be run in parallel with
the rest of the boot.

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

conf.c

@@ -23,7 +23,6 @@
 
 #include "config.h"		/* Generated by configure script */
 
-#include <ctype.h>
 #include <dirent.h>
 #include <string.h>
 #include <sys/resource.h>
@@ -41,23 +40,6 @@
 static int parse_conf(char *file);
 
 
-static char *strip_line(char *line)
-{
-	char *ptr;
-
-	/* Trim leading whitespace */
-	while (*line && isblank(*line))
-		line++;
-
-	/* Strip any comment at end of line */
-	ptr = line;
-	while (*ptr && *ptr != '#')
-		ptr++;
-	*ptr = 0;
-
-	return line;
-}
-
 void conf_parse_cmdline(void)
 {
 	FILE *fp;