Merge branch 'PHP-5.6' into PHP-7.0

diff --cc NEWS
index 01d9fe2e30d65744ba556b520cf1cc1545997f79,415050456f7621d4664f3c31e3a21dcde176a6fd..c20abb5ee7cd11492226ffa0c14a57a601664ef6
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -16,20 -7,10 +16,21 @@@ PH
    . Fixed bug #73272 (imagescale() is not affected by, but affects
      imagesetinterpolation()). (cmb)
    . Fixed bug #73279 (Integer overflow in gdImageScaleBilinearPalette()). (cmb)
+   . Fixed bug #73280 (Stack Buffer Overflow in GD dynamicGetbuf). (cmb)
  
 +- phpdbg:
 +  . Properly allow for stdin input from a file. (Bob)
 +  . Add -s command line option / stdin command for reading script from stdin.
 +    (Bob)
 +
 +- Session:
 +  . Fixed bug #73273 (session_unset() empties values from all variables in which
 +    is $_session stored). (Nikita)
 +
  - SOAP:
    . Fixed bug #73037 (SoapServer reports Bad Request when gzipped). (Anatol)
 +  . Fixed bug #73237 (Nested object in "any" element overwrites other fields).
 +    (Keith Smiley)
  
  - Standard:
    . Fixed bug #73203 (passing additional_parameters causes mail to fail). (cmb)