Fix compilation: do not redefine the strcasestr function.

PR:		33999
Submitted by:	Miguel Mendez <flynn@eneryhq.homeip.net>

security/nessus/files/patch-nessus-html_graph_output.c

@@ -0,0 +1,31 @@
+--- nessus/html_graph_output.c.old	Thu Jan 17 18:44:40 2002
++++ nessus/html_graph_output.c	Thu Jan 17 18:47:20 2002
+@@ -65,8 +65,9 @@
+ #include "globals.h"
+ #include "nsr_output.h"
+ 
+-
++#ifndef __FreeBSD__
+ static char* strcasestr(char*, char *);
++#endif 
+ static void insert_img(FILE *, char*);
+ 
+ 
+@@ -90,7 +91,8 @@
+ /*
+  * Handy functions
+  */
+- 
++
++#ifndef __FreeBSD__ 
+ static char * 
+ strcasestr(char * haystack, char * needle)
+ {
+@@ -109,6 +111,7 @@
+  }
+  return NULL;
+ }
++#endif
+ 
+ static void
+ insert_img(f, name)