Add some missed entry

NEWS

@@ -11,6 +11,7 @@
   . Improved __call() and __callStatic() magic method handling. Now they are
     called in a stackless way using ZEND_CALL_TRAMPOLINE opcode, without
     additional stack frame. (Laruence, Dmitry)
+  . Optimized strings concatenation. (Dmitry, Laruence)
   . Fixed weird operators behavior. Division by zero now emits warning and 
     returns +/-INF, modulo by zero and intdid() throws an exception, shifts
     by negative offset throw exceptions. Compile-time evaluation of division
@@ -67,6 +68,8 @@
   . Added error_clear_last() function. (Reeze Xia)
   . Fixed bug #68797 (Number 2.2250738585072012e-308 converted incorrectly).
     (Anatol)
+  . Added hybrid sorting algo zend_sort for better performance. (Laruence)
+  . Added stable sorting algo zend_insert_sort. (Laruence)
   . Implemented the RFC `Scalar Type Decalarations v0.5`. (Anthony)
   . Implemented the RFC `Group Use Declarations`. (Marcio)
   . Implemented the RFC `Continue Output Buffering`. (Mike)

UPGRADING.INTERNALS

@@ -195,6 +195,12 @@ PHP 7.0 INTERNALS UPGRADE NOTES
      as first argument, if you still need to fetch a resource from zval, use 
      zend_fetch_resource_ex. More details can be found in Zend/zend_list.c.
 
+  t. Optimized strings concatenation.
+     ZEND_ADD_STRING/VAR/CHAR are replaced with ZEND_ROPE_INTI, ZEND_ROPE_ADD,
+     ZEND_ROPE_END.
+     Instead of reallocation and copying string on each ZEND_ADD_STRING/VAR/CAHR,
+     collect all the strings and then alloca te and construct the resulting string once.
+
 
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 2. Build system changes