treewide: Add include guards

...at the moment, just for consistency with packet.h, icmp.h,
tcp.h and udp.h.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/conf.h b/conf.h
index 4d2aff1..c39d413 100644
--- a/conf.h
+++ b/conf.h
@@ -3,5 +3,10 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef CONF_H
+#define CONF_H
+
 void conf(struct ctx *c, int argc, char **argv);
 void get_bound_ports(struct ctx *c, int ns, uint8_t proto);
+
+#endif /* CONF_H */