Add an "hostname" config option.

It is overridden by the -h command line option.

Signed-off-by: Benjamin Cama <benoar@dolka.fr>

l2tpns.h

@@ -38,6 +38,7 @@
 #define PPPoE_MRU	1492		// maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
 #define MAXETHER	(MAXMTU+18)	// max packet we try sending to tun
 #define MAXTEL		96		// telephone number
+#define MAXHOSTNAME	256		// hostname
 #define MAXUSER		128		// username
 #define MAXPASS		128		// password
 #define MAXPLUGINS	20		// maximum number of plugins to load
@@ -713,6 +714,7 @@ typedef struct
 	int		cluster_master_min_adv;		// Master advertises routes while the number of up to date
 							// slaves is less than this value.
 	in_addr_t	cli_bind_address;		// bind address for CLI
+	char		hostname[MAXHOSTNAME];	// hostname (overridden by -h on command line)
 	// Guest change
 	char            guest_user[MAXUSER];            // Guest account username