Convert all code to Linux coding style

After so many years of silence, we don't expect the original author to
return to the project.  To make things a bit simpler for us, we convert
the coding style to what we are used to (Linux style).

The conversion was made using the 'Lindent' script which is part of the
Linux kernel.
diff --git a/lib/tun.h b/lib/tun.h
index 7972c53..ce7b91c 100644
--- a/lib/tun.h
+++ b/lib/tun.h
@@ -12,44 +12,42 @@
 #ifndef _TUN_H
 #define _TUN_H
 
-#define PACKET_MAX      8196 /* Maximum packet size we receive */
+#define PACKET_MAX      8196	/* Maximum packet size we receive */
 #define TUN_SCRIPTSIZE   256
 #define TUN_ADDRSIZE     128
 #define TUN_NLBUFSIZE   1024
 
 struct tun_packet_t {
-  unsigned int ver:4;
-  unsigned int ihl:4;
-  unsigned int dscp:6;
-  unsigned int ecn:2;
-  unsigned int length:16;
-  unsigned int id:16;
-  unsigned int flags:3;
-  unsigned int fragment:13;
-  unsigned int ttl:8;
-  unsigned int protocol:8;
-  unsigned int check:16;
-  unsigned int src:32;
-  unsigned int dst:32;
+	unsigned int ver:4;
+	unsigned int ihl:4;
+	unsigned int dscp:6;
+	unsigned int ecn:2;
+	unsigned int length:16;
+	unsigned int id:16;
+	unsigned int flags:3;
+	unsigned int fragment:13;
+	unsigned int ttl:8;
+	unsigned int protocol:8;
+	unsigned int check:16;
+	unsigned int src:32;
+	unsigned int dst:32;
 };
 
-
 /* ***********************************************************
  * Information storage for each tun instance
  *************************************************************/
 
 struct tun_t {
-  int fd;                /* File descriptor to tun interface */
-  struct in_addr addr;
-  struct in_addr dstaddr;
-  struct in_addr netmask;
-  int addrs;             /* Number of allocated IP addresses */
-  int routes;            /* One if we allocated an automatic route */
-  char devname[IFNAMSIZ];/* Name of the tun device */
-  int (*cb_ind) (struct tun_t *tun, void *pack, unsigned len);
+	int fd;			/* File descriptor to tun interface */
+	struct in_addr addr;
+	struct in_addr dstaddr;
+	struct in_addr netmask;
+	int addrs;		/* Number of allocated IP addresses */
+	int routes;		/* One if we allocated an automatic route */
+	char devname[IFNAMSIZ];	/* Name of the tun device */
+	int (*cb_ind) (struct tun_t * tun, void *pack, unsigned len);
 };
 
-
 extern int tun_new(struct tun_t **tun);
 extern int tun_free(struct tun_t *tun);
 extern int tun_decaps(struct tun_t *this);
@@ -58,17 +56,16 @@
 extern int tun_addaddr(struct tun_t *this, struct in_addr *addr,
 		       struct in_addr *dstaddr, struct in_addr *netmask);
 
-
-extern int tun_setaddr(struct tun_t *this, struct in_addr *our_adr, 
+extern int tun_setaddr(struct tun_t *this, struct in_addr *our_adr,
 		       struct in_addr *his_adr, struct in_addr *net_mask);
 
-int tun_addroute(struct tun_t *this, struct in_addr *dst, 
+int tun_addroute(struct tun_t *this, struct in_addr *dst,
 		 struct in_addr *gateway, struct in_addr *mask);
 
-extern int tun_set_cb_ind(struct tun_t *this, 
-     int (*cb_ind) (struct tun_t *tun, void *pack, unsigned len));
+extern int tun_set_cb_ind(struct tun_t *this,
+			  int (*cb_ind) (struct tun_t * tun, void *pack,
+					 unsigned len));
 
+extern int tun_runscript(struct tun_t *tun, char *script);
 
-extern int tun_runscript(struct tun_t *tun, char* script);
-
-#endif	/* !_TUN_H */
+#endif /* !_TUN_H */