Merge branch 'PHP-7.4'

* PHP-7.4:
  Update NEWS
  Fix bug #79037 (global buffer-overflow in `mbfl_filt_conv_big5_wchar`)
  Fix #79099: OOB read in php_strip_tags_ex
  Fix #79091: heap use-after-free in session_create_id()

diff --cc ext/session/session.c
Simple merge

diff --cc ext/standard/string.c
Simple merge