#include <string.h> if HAVE_STRING_H is defined. Cleans up several

integer-pointer conversions errors in librewrite (on FreeBSD 4.2).

include/rewrite.h

@@ -25,6 +25,10 @@
 #ifndef REWRITE_H
 #define REWRITE_H
 
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
 LDAP_BEGIN_DECL
 
 /*