Core:
    Fixed #80706 (mail(): Headers after Bcc headers may be ignored).
MySQLnd:
    Fixed bug #78680 (mysqlnd's mysql_clear_password does not transmit null-terminated password).
MySQLi:
    Fixed bug #74779 (x() and y() truncating floats to integers).
OPcache:
    Fixed bug #80682 (opcache doesn't honour pcre.jit option).
OpenSSL:
    Fixed bug #80747 (Providing RSA key size < 512 generates key that crash PHP).
Phar:
    Fixed bug #75850 (Unclear error message wrt. __halt_compiler() w/o semicolon) (cmb)
    Fixed bug #70091 (Phar does not mark UTF-8 filenames in ZIP archives).
    Fixed bug #53467 (Phar cannot compress large archives).
SPL:
    Fixed bug#80719 (Iterating after failed ArrayObject::setIteratorClass() causes Segmentation fault).
Standard:
    Fixed bug #80654 (file_get_contents() maxlen fails above (2**31)-1 bytes).
Zip:
    Fixed bug #80648 (Fix for bug 79296 should be based on runtime version).