NSCA memleak fix

[Mark Ferlatte]

Fix for a fairly nasty memory leak in the nsca daemon.  Without this patch,
nsca was growing to ~80MB overnight under my (~1000 passive check) loads.

Unfortunately, there is still another leak in there somewhere, but it's much
much smaller now.

From my testing, the leak is definately related to mcrypt; with mcrypt
disabled, there is no leak that I can see.

Patch against CVS from today is attached.

M
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Index: utils.c
===================================================================
RCS file: /cvsroot/nagios/nsca/src/utils.c,v
retrieving revision 1.4
diff -u -r1.4 utils.c
--- utils.c	15 Oct 2003 23:17:46 -0000	1.4
+++ utils.c	24 Oct 2003 22:37:28 -0000
@@ -254,6 +254,14 @@
         /* mcrypt cleanup */
         if(encryption_method!=ENCRYPT_NONE && encryption_method!=ENCRYPT_XOR)
                 mcrypt_generic_end(CI->td);
+				free(CI->key);
+				CI->key = NULL;
+				free(CI->IV);
+				CI->IV = NULL;
+				free(CI->mcrypt_algorithm);
+				CI->mcrypt_algorithm = NULL;
+				free(CI->mcrypt_mode);
+				CI->mcrypt_mode = NULL;
 #endif
 
         free(CI);
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