use memmove() in appropriate places
diff --git a/src/core/ngx_string.h b/src/core/ngx_string.h
index 3f1e91e..2030988 100644
--- a/src/core/ngx_string.h
+++ b/src/core/ngx_string.h
@@ -135,6 +135,10 @@
 #endif
 
 
+#define ngx_memmove(dst, src, n)   (void) memmove(dst, src, n)
+#define ngx_movemem(dst, src, n)   (((u_char *) memmove(dst, src, n)) + (n))
+
+
 /* msvc and icc7 compile memcmp() to the inline loop */
 #define ngx_memcmp(s1, s2, n)  memcmp((const char *) s1, (const char *) s2, n)