Merge from /nmap-exp/luis/nmap-os6.

svn merge --ignore-ancestry svn://svn.insecure.org/nmap@26621 svn://svn.insecure.org/nmap-exp/luis/nmap-os6

This is the IPv6 OS detection branch. "nmap -6 -O" works now, though at
this point it only prints fingerprints and not OS guesses, because we
need to collect more submissions.

liblinear/tron.h

@@ -0,0 +1,34 @@
+#ifndef _TRON_H
+#define _TRON_H
+
+class function
+{
+public:
+	virtual double fun(double *w) = 0 ;
+	virtual void grad(double *w, double *g) = 0 ;
+	virtual void Hv(double *s, double *Hs) = 0 ;
+
+	virtual int get_nr_variable(void) = 0 ;
+	virtual ~function(void){}
+};
+
+class TRON
+{
+public:
+	TRON(const function *fun_obj, double eps = 0.1, int max_iter = 1000);
+	~TRON();
+
+	void tron(double *w);
+	void set_print_string(void (*i_print) (const char *buf));
+
+private:
+	int trcg(double delta, double *g, double *s, double *r);
+	double norm_inf(int n, double *x);
+
+	double eps;
+	int max_iter;
+	function *fun_obj;
+	void info(const char *fmt,...);
+	void (*tron_print_string)(const char *buf);
+};
+#endif