pingu: implement new config format

New format allows users to define interfaces and ping hosts separately.
This means we can run pingu in routing-only mode to set up and manage
route tables for multi-isp.

We allow the user config a preferred alternate route table for each
interface. If not configured, pingu will pick one.

Example interface definition looks like:

interface eth0 {
	route-table 10
}

Example host definition looks like:

host 192.168.0.1 {
	bind-interface eth0
}

1 files changed, 6 insertions, 0 deletions

diff --git a/pingu_conf.h b/pingu_conf.h
new file mode 100644
index 0000000..8962475
--- /dev/null
+++ b/pingu_conf.h
@@ -0,0 +1,6 @@
+#ifndef PINGU_CONF_H
+#define PINGU_CONF_H
+
+int pingu_conf_read(const char *filename);
+
+#endif