When the pointer 'from' changes, it's stored length needs to change as

well.

Notified by Frank Kardel <kardel@acm.org> in PR 879.

crypto/conf/conf_def.c

@@ -632,6 +632,11 @@ static int str_copy(CONF *conf, char *section, char **pto, char *from)
 			BUF_MEM_grow_clean(buf,(strlen(p)+len-(e-from)));
 			while (*p)
 				buf->data[to++]= *(p++);
+
+			/* Since we change the pointer 'from', we also have
+			   to change the perceived length of the string it
+			   points at.  /RL */
+			len -= e-from;
 			from=e;
 			}
 		else