MFH: r500999 r501013

lang/php71: Update from 7.1.28 to 7.1.29

Changelog:

EXIF:
    Fixed bug #77950 (Heap-buffer-overflow in _estrndup via exif_process_IFD_TAG).
Mail:
    Fixed bug #77821 (Potential heap corruption in TSendMail()).

Changelog taken from: https://www.php.net/ChangeLog-7.php#7.1.29

lang/php71: put mailheader patch back

Reported by: mat

Approved by: ports-secteam (mivy)