Merge branch 'master' into safe_timeout

Merge branch 'master' into safe_timeout

* master:
  Fixed bug #72059 - Reference the bug id directly in NEWS
  Fix magic constants (__LINE__) with ?? for constant scalar exprs
  Add NEWS entry for ?? in constant scalar expressions
  allow null coalescing (??) on constant expressions
  Fix intl tests for ICU < 52
  Fix ZTS builds by adding a missing TSRMLS_FETCH().
  Fix bug #71737
  Update NEWS
  Fix RECV opcode to handle all kinds of exceptions
  Fix RECV opcode to handle all kinds of exceptions